WO2019182377A1 - Method, electronic device, and computer-readable recording medium for generating address information used for transaction of blockchain-based cryptocurrency - Google Patents

Abstract

An electronic device for performing transaction of blockchain-based cryptocurrency is disclosed. The electronic device may comprise: a communication circuit which is connected through a network and performs communication with a plurality of external electronic devices having a plurality of private keys and a plurality of public keys corresponding to the plurality of private keys stored therein, respectively; a memory for storing access information for accessing the plurality of external electronic devices; and a processor electrically connected to the memory and the communication circuit, wherein the processor: controls the communication circuit to access the plurality of external electronic devices by using the access information; receives the plurality of public keys from the plurality of external electronic devices through the communication circuit; generates address information used for transaction of first cryptocurrency, using the plurality of public keys; and configures the number of private keys required for a digital signature used for the transaction of the first cryptocurrency through the address information, among the plurality of private keys.

Description

Address information generation method, electronic device and computer readable recording medium used for transaction of blockchain based cryptocurrency

The present disclosure relates to a method for generating address information, an electronic device, and a computer-readable recording medium used for a transaction of a blockchain-based cryptocurrency.

Recently, blockchain-based cryptocurrencies have been used in online transactions, and various kinds of blockchain-based cryptocurrencies have been used. Unlike traditional fiat currency, cryptocurrency is implemented based on blockchain technology for central authority or bankless operation.

In addition, digital signature technology is used for cryptocurrency transactions. Digital signature technology is a technology for identifying the sender of a message, and is performed using a public key encryption algorithm in a transaction of cryptocurrency. The public key and the private key used in the public key encryption algorithm are paired with each other. The public key is open to everyone, but the private key is only known to the user, and in the transaction of cryptocurrency, if the private key is leaked, it cannot use its own cryptocurrency. Is required.

In a cryptocurrency transaction, a cryptocurrency transaction is established by confirming the sender of the message used in the cryptocurrency transaction by using an electronic signature technique. Thus, the private key used to identify who sent the message needs to be managed with a high level of security. In addition, the user has to remember all the private key for the transaction of cryptocurrency or to manage the private key separately in their own way, there is an inconvenience in managing the private key.

Various embodiments of the present disclosure may provide a method for solving the above-described problems or other problems, an electronic device for performing a transaction of a blockchain-based cryptocurrency, a method, and a computer-readable recording medium.

According to an embodiment of the present disclosure, an electronic device that performs a transaction of a blockchain-based cryptocurrency is connected through a network, and stores a plurality of private keys and a plurality of public keys corresponding to the plurality of private keys, respectively. A communication circuit configured to communicate with an external electronic device, a memory storing connection information for connecting to the plurality of external electronic devices, and a processor electrically connected to the memory and the communication circuit, wherein the processor includes: the connection; Control the communication circuit to connect to the plurality of external electronic devices using information, receive the plurality of public keys from the plurality of external electronic devices through the communication circuit, and use the plurality of public keys. And generating address information used for a transaction of the first cryptocurrency, wherein the address definition is one of the plurality of private keys. The number of private keys required for the electronic signature used in the transaction of the first cryptocurrency through the beam can be set.

In one embodiment, the number of private keys may be set to be equal to or less than the number of received public keys.

In one embodiment, the electronic device further comprises an input interface for receiving authentication information used for connecting to a plurality of external electronic devices from a user, wherein the processor is configured to receive the connection information and the received information via the input interface. The communication circuit may be controlled to connect to the plurality of external electronic devices using the authentication information.

In an embodiment, the memory may further store information for confirming whether the plurality of public keys have been modulated, and when the plurality of public keys are received, the processor verifies whether the plurality of public keys have been modulated. On the basis of the information to confirm, if it is confirmed whether the plurality of public keys have been modified, and if it is confirmed that the plurality of public keys are not modulated, the address information can be generated using the plurality of public keys.

In an embodiment, the processor is further configured to generate a transaction message for a transaction of the first cryptocurrency when the electronic signature is performed using each of the set number of private keys among the plurality of private keys. The communication circuit may be controlled to generate a smart contract and to broadcast the generated smart contract.

In an embodiment, the processor may be configured to receive, from the at least one external electronic device of the plurality of external devices, the set number of the plurality of first private keys of the plurality of private keys through the communication circuit, Digitally signing the first transaction message generated for the transaction of the first cryptocurrency using each of the plurality of first private keys, and performing electronic signature using each of the plurality of first private keys The communication circuit can be controlled to broadcast a first transaction message.

In at least one example embodiment, the at least one external electronic device may be selected according to a user input or a set algorithm.

In one embodiment, when the plurality of first private keys is received, the processor determines whether the plurality of first private keys are modulated based on information for confirming whether the plurality of private keys have been modulated. If it is confirmed that the plurality of first private keys have not been tampered with, the first transaction message may be digitally signed using each of the plurality of first private keys.

In an embodiment, the plurality of private keys are encrypted and stored in the plurality of external electronic devices, and the processor decrypts the plurality of first private keys when the user is authenticated through authentication information input from a user. And digitally sign the first transaction message using each of the plurality of decrypted first private keys.

According to an embodiment of the present disclosure, in a non-transitory computer readable recording medium having recorded thereon a program for performing on a computer, the program may be executed by a processor when the processor executes a plurality of private keys and the plurality of private individuals. Acquiring connection information for accessing a plurality of external electronic devices each of which stores a plurality of public keys corresponding to a key; using the connection information, accessing the plurality of external electronic devices to access the plurality of external electronic devices Receiving the plurality of public keys from the server; generating address information used for a transaction of a first cryptocurrency using the plurality of public keys; and among the plurality of private keys, the first through the address information. 1 Set the number of private keys required for digital signatures used in cryptocurrency transactions. Run may include the possible commands.

In one embodiment, the executable command may generate a transaction message for a transaction of the first cryptocurrency when the electronic signature is performed using each of the set number of private keys among the plurality of private keys. The smart contract may be further performed.

In an embodiment, the executable command may include receiving, from the at least one external electronic device of the plurality of external devices, the set number of the plurality of first private keys of the plurality of private keys. Performing a digital signature on each of the plurality of first private keys for the first transaction message generated for a transaction of a cryptocurrency, and performing a digital signature on each of the plurality of first private keys One may further perform the step of broadcasting a transaction message.

In an embodiment, the generating of the address information used for the transaction of the first cryptocurrency may include: when the plurality of public keys are received, based on information for confirming whether the plurality of public keys have been tampered with, Checking whether the plurality of public keys have been tampered with, and if it is determined that the plurality of public keys have not been tampered with, generating address information used for the transaction of the first cryptocurrency using the plurality of public keys; It may include.

According to an embodiment of the present disclosure, a method of generating address information used for a transaction of a blockchain-based cryptocurrency includes a plurality of external keys in which a plurality of private keys and a plurality of public keys corresponding to the plurality of private keys are stored, respectively. Acquiring connection information for accessing an electronic device, accessing the plurality of external electronic devices using the connection information, and receiving the plurality of public keys from the plurality of external electronic devices, the plurality of Generating address information used in the transaction of the first cryptocurrency, using the public key, and an individual required for the electronic signature used in the transaction of the first cryptocurrency via the address information, among the plurality of private keys The number of keys may be set.

According to an embodiment of the present disclosure, an electronic device performing a transaction of a blockchain-based cryptocurrency may include an input interface for receiving an input from a user and a communication circuit for communicating with at least one external electronic device connected through a network. And a memory storing a first algorithm for generating a value according to an input received through the input interface and a second algorithm for generating a private key, and a processor electrically connected to the input interface, the communication circuit and the memory. When the first input is received through the input interface, the processor generates the first value by applying the first input to the first algorithm and corresponds to the second input received through the input interface. The at least one external device requesting transmission of first data and second data Control the communication circuit to transmit, receive the first data and the second data from the at least one external electronic device via the communication circuit, and in the second algorithm, the first data and the second data A plurality of first private keys are generated by applying at least one of the first values and the first value, and used for a transaction of a first cryptocurrency using a plurality of first public keys corresponding to the plurality of first private keys. Can generate address information.

In one embodiment, the processor is configured to set the number of private keys required for the electronic signature used in the transaction of the first cryptocurrency through the address information, among the plurality of first private keys, The number may be set to be equal to or less than the number of the generated first public keys.

In one embodiment, after generating the address information, the processor may discard the generated plurality of first private keys.

In one embodiment, when the first input is received again through the input interface, the processor applies the first input to the first algorithm to regenerate the first value and re-creates the input through the input interface. Control the communication circuit to transmit the first data corresponding to the received second input and the transmission request for the second data to the at least one external device, and from the at least one external electronic device through the communication circuit. Receiving first data and the second data, applying at least one of the first data and the second data and the first value to the second algorithm, restoring the plurality of first private keys, and Digitally sign each of the plurality of restored first private keys for a first transaction message generated for a transaction of a first cryptocurrency; It can be restored by using the plurality of first private keys, respectively, to control the communication circuit electronic signature the first to broadcast the message transaction performed.

In one embodiment, the processor may discard the restored plurality of first private keys after broadcasting the first transaction message.

In one embodiment, the processor obtains a first hash value and a second hash value for each of the first data and the second data by using a hash function, and the first algorithm determines the first hash value and the second hash value. The plurality of first private keys may be generated by applying at least one of the second hash values and the first value.

According to various embodiments of the present disclosure, each of the plurality of private keys and the plurality of public keys corresponding to the plurality of private keys may be stored in a plurality of external electronic devices. In addition, when generating address information used for a transaction of a cryptocurrency or generating transaction data for a cryptocurrency, a plurality of public keys or a plurality of private keys are received and used from at least one external electronic device among a plurality of external electronic devices. Can be. In this way, a plurality of private keys are stored in each of the plurality of external electronic devices, and received and used from the plurality of external electronic devices only when a cryptocurrency is required, so that the private keys can be managed at a higher security level. In addition, since the user does not need to store all the private keys, the private keys can be more conveniently managed.

1 is a block diagram of an electronic device and an external electronic device according to various embodiments of the present disclosure;

2 is a flowchart illustrating a method of generating address information used in a cryptocurrency transaction by an electronic device according to various embodiments of the present disclosure.

3 is a flowchart illustrating a method of operating an electronic device according to whether a public key is modulated according to various embodiments of the present disclosure.

4 is a flowchart of a method for broadcasting a transaction message by an electronic device according to various embodiments of the present disclosure.

5 is a flowchart illustrating an address generation method used for a cryptocurrency transaction by an electronic device according to various embodiments of the present disclosure.

6 is a flowchart of a method for broadcasting a transaction message by an electronic device according to various embodiments of the present disclosure.

Embodiments of the present disclosure are illustrated for the purpose of describing the technical spirit of the present disclosure. The scope of the present disclosure is not limited to the embodiments set forth below or the detailed description of these embodiments.

All technical and scientific terms used in the present disclosure, unless defined otherwise, have the meanings that are commonly understood by one of ordinary skill in the art to which this disclosure belongs. All terms used in the present disclosure are selected for the purpose of more clearly describing the present disclosure, and are not selected to limit the scope of the rights according to the present disclosure.

As used in this disclosure, expressions such as "comprising", "including", "having", and the like, are open terms that imply the possibility of including other embodiments unless otherwise stated in the phrase or sentence in which the expression is included. It should be understood as (open-ended terms).

As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

Expressions such as “first”, “second”, and the like used in the present disclosure are used to distinguish a plurality of components from each other, and do not limit the order or importance of the components.

As used in this disclosure, the expression “based on” is used to describe one or more factors that affect the behavior or behavior of a decision, judgment, described in a phrase or sentence that includes the expression, which expression Does not exclude additional factors that affect decisions, actions of behaviour, or actions.

In the present disclosure, when a component is referred to as being "connected" or "connected" to another component, the component may be directly connected to or connected to the other component, or new It is to be understood that the connection may be made or may be connected via other components.

Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. In the accompanying drawings, the same or corresponding components are given the same reference numerals. In addition, in the following description of the embodiments, it may be omitted to duplicate the same or corresponding components. However, even if the description of the component is omitted, it is not intended that such component is not included in any embodiment.

1 is a block diagram of an electronic device and an external electronic device according to various embodiments of the present disclosure;

According to various embodiments of the present disclosure, the electronic device 100 may include a communication circuit 110, a memory 120, and a processor 130. In addition, the electronic device 100 may further include an input interface 140. The plurality of components included in the electronic device 100 may be electrically connected through a bus (not shown) to transmit and receive information, control commands, data, and the like. For example, the electronic device 100 may include various electronic devices that can be used to perform a blockchain-based cryptocurrency transaction, such as a smart phone, a tablet PC, a desktop PC, a wearable device, and the like. For example, a transaction of cryptocurrency may include at least one of an operation for transferring ownership of the cryptocurrency to another person and uploading data to the blockchain (e.g., a function call operation of a smart contract). Can be.

In one embodiment, the cryptocurrency using blockchain technology is a currency that can be used to create new coins or securely proceed transactions using cryptography, which may be a kind of digital currency. Cryptocurrency, unlike real money, is distributed and operated in a peer-to-peer manner on the Internet network without a central bank issuing money, and cryptocurrency can be issued and managed through blockchain technology. For example, cryptocurrencies may include Bitcoin, Ethereum, Stellar Lumen, Litecoin, and the like. However, this is only for the purpose of description and the present invention is not limited thereto. The cryptocurrency below may include various types of cryptocurrencies based on blockchain technology.

In an embodiment, the communication circuit 110 may communicate with the plurality of external electronic devices 150 and 151. For example, the communication circuit 110 may establish communication between the electronic device 110 and the plurality of external electronic devices 150 and 151. The communication circuit 110 may be connected to a network through wireless or wired communication to communicate with a plurality of external electronic devices 150 and 151. As another example, the communication circuit 110 may be connected to the plurality of external electronic devices 150 and 151 by wire to perform communication.

Wireless communication may include, for example, cellular communication (eg, LTE, LTE Advance (LTE-A), code division multiple access (CDMA), wideband CDMA (WCDMA), universal mobile telecommunications system (UMTS), and wireless broadband (WiBro). And the like). In addition, the wireless communication may include short-range wireless communication (eg, wireless fidelity (WiFi), light fidelity (LiFi), Bluetooth, Bluetooth low power (BLE), Zigbee, near field communication (NFC), etc.). .

In an embodiment, the plurality of external electronic devices 150 and 151 may include external servers that store and manage data. For example, subjects managing each of the plurality of external electronic devices 150 and 151 may be different.

In one embodiment, the private and public keys are public key cryptographic algorithms that ensure that the encryption key and the decryption key are not the same (or that one key cannot easily infer another key). As a key used in (eg, an RSA algorithm), a public key may be a key that is disclosed to everyone, and a private key may be a key that only the user knows and is not disclosed to others. For example, a message encrypted with a public key may be decrypted through a private key, and a message encrypted with a private key may be decrypted through a public key.

According to an embodiment, the plurality of external electronic devices 150 and 151 may store a plurality of private keys and a plurality of public keys corresponding to the plurality of private keys, respectively. For example, the first external electronic device 151 stores the first private key and the first public key corresponding to the first private key, and the second external electronic device 152 stores the second private key and the second private key. The second public key corresponding to the key may be stored. The private key and the public key stored in the plurality of external electronic devices 150 and 151 may be different from each other. Hereinafter, the plurality of external electronic devices 150 and 151 will be described based on storing one private key and one public key, but the present invention is not limited thereto, and each of the plurality of external electronic devices 150 and 151 may be described. May store a plurality of private keys and a plurality of public keys.

In an embodiment, the processor 130 may transmit the plurality of private keys and the plurality of public keys corresponding to the plurality of private keys to the plurality of external electronic devices 150 and 151. For example, the processor 130 may generate a plurality of public keys corresponding to the plurality of private keys using an algorithm configured to convert the private key into a public key.

For example, the processor 130 may advance the plurality of private keys and the plurality of public keys to the plurality of external electronic devices 150 and 151 before performing the process of generating address information used for the transaction of the virtual currency. I can send it. As another example, when an input for instructing generation of address information used for a transaction of a virtual currency is received, the processor 130 may transmit a plurality of private keys and a plurality of public keys to the plurality of external electronic devices 150 and 151. It may be.

As another example, the processor 130 may transmit only a plurality of private keys to the plurality of external electronic devices 150 and 151. When the plurality of external electronic devices 150 and 151 receive only a plurality of private keys, the plurality of external electronic devices 150 and 151 may generate and store a plurality of public keys corresponding to the plurality of private keys using an algorithm configured to convert the private key into a public key. .

In an embodiment, the memory 120 may store instructions or data related to at least one other element of the electronic device 100. In addition, the memory 120 may store software and / or a program.

For example, the memory 120 may include an internal memory or an external memory. The internal memory may include, for example, at least one of volatile memory (eg, DRAM, SRAM, or SDRAM), nonvolatile memory (eg, flash memory, hard drive, or solid state drive (SSD)). The external memory may be functionally or physically connected to the electronic device 201 through various interfaces.

In an embodiment, the memory 120 may store access information for accessing the plurality of external electronic devices 150 and 151. For example, the connection information may include information about the plurality of external electronic devices 150 and 151 storing the private key and the public key and address information (such as an IP address) of the plurality of external electronic devices 150 and 151. As such, information used to access the plurality of external electronic devices 150 and 151 may be included.

In an embodiment, the processor 130 may control at least one other component of the electronic device 100 by driving an operating system or an application program, and may perform various data processing and operations. For example, the processor 130 may include a central processing unit and the like, and may be implemented as a system on chip (SoC).

In an embodiment, the input interface 140 may transfer an input received from the user to at least one other component of the electronic device 100. For example, the input interface 140 may include a touch screen, a keypad, a mouse, a keyboard, and the like.

In an embodiment, the processor 130 may control the communication circuit 110 to connect to the plurality of external electronic devices 150 and 151 using the connection information stored in the memory 120. For example, when an input for instructing generation of address information used for a transaction of a cryptocurrency is received from the user through the input interface 140, the processor 130 uses the access information to display a plurality of external electronic devices 150 and 151. Communication circuit 110 can be controlled to

Hereinafter, for convenience of description, the processor 130 will be described based on controlling the communication circuit 110 to connect to the plurality of external electronic devices 150 and 151 based on the connection information. The communication circuit 110 may be controlled to connect to at least one of the plurality of external electronic devices 150 and 151.

In an embodiment, the input interface 140 may receive authentication information used to connect to the plurality of external electronic devices 150 and 151 from the user. The processor 130 displays a screen for requesting input of authentication information for the user when authentication information about the user of the electronic device 100 is required to access the plurality of external electronic devices 150 and 151 (not shown). Can be displayed.

In addition, the processor 130 controls the communication circuit 110 to access the plurality of external electronic devices 150 and 151 using the authentication information received through the input interface 140 and the connection information stored in the memory 120. can do. For example, the processor 130 transmits authentication information to the plurality of external electronic devices 150 and 151 using the connection information, and receives a message indicating authentication success from the plurality of external electronic devices 150 and 151. Thereafter, the communication circuit 110 may be connected to the plurality of external electronic devices 150 and 151.

In an embodiment, the processor 130 may receive a plurality of public keys from the plurality of external electronic devices 150 and 151 connected through the communication circuit 110. For example, the processor 130 may receive the first public key from the first external electronic device 150 and the second public key from the second external electronic device 151.

As another example, the processor 130 may receive a plurality of private keys from the plurality of external electronic devices 150 and 151 through the communication circuit 110. In this case, the processor 130 may generate a plurality of public keys using the received plurality of private keys. For example, when the processor 130 receives the first private key from the first external electronic device 150 and receives the second private key from the second external electronic device 151, the processor 130 discloses the private key. According to an algorithm for generating a key, the first public key may be generated using the first private key, and the second public key may be generated using the second private key.

In one embodiment, the processor 130 may generate address information used for a transaction of the first cryptocurrency, using the received plurality of public keys. For example, the processor 130 uses the public key to generate address information used for the transaction of the cryptocurrency, and the address information used for the transaction of the first cryptocurrency using the received plurality of public keys. Can be generated. The first cryptocurrency may be at least a part of the cryptocurrency held by the user of the electronic device 100.

In an embodiment, the processor 130 may generate at least one first external electronic device in addition to the public keys received from the plurality of external electronic devices 150 and 151 to generate address information used for the transaction of the first cryptocurrency. The public key received from can be further used. In this case, when generating a transaction message using the generated address information, the processor 130 may request to perform the electronic signature on the transaction message and the transaction message. A detailed method of requesting the at least one first external electronic device to the transaction message and the electronic signature for the transaction message by the processor 130 will be described later.

According to an embodiment, the memory 120 may include at least one of information for confirming whether a plurality of private keys are stored in the plurality of external electronic devices 150 and 151 and information for confirming whether a plurality of public keys are modulated. You can save more. For example, the information for confirming whether the plurality of private keys are modulated may include a value for confirming whether the plurality of private keys has been modulated, and the information for confirming whether the plurality of public keys has been modulated may include a plurality of information. It may include a value for checking whether the public key has been tampered with. For example, a value for confirming whether a plurality of private keys or a plurality of public keys are modulated may include an electronic signature value (for example, SHA256, MD5, etc.).

For example, when the processor 130 transmits a plurality of private keys and a plurality of public keys to the plurality of external electronic devices 150 and 151, information for confirming whether a plurality of private keys are modulated or a plurality of information. At least one of information for confirming whether the public key is modulated may be generated and stored in the memory 120. In addition, information for confirming whether a plurality of public keys generated by the plurality of external electronic devices 150 and 151 are modulated may be received and stored in the memory 120. In addition, the information for confirming whether the plurality of private keys have been modulated and the information for confirming whether the plurality of public keys have been modulated are stored in a memory of another electronic device that is linked with the electronic device 100 by wire or wirelessly. The processor 130 may receive and use the communication circuit 110 in a process of checking whether the private key and the plurality of public keys are modulated. In this case, the processor 130 checks whether the plurality of private keys and the plurality of public keys have been modulated and then checks whether the received plurality of private keys have been modulated and whether the plurality of public keys have been modulated. Information may be discarded.

According to an embodiment, when a plurality of public keys are received from the plurality of external electronic devices 150 and 151, the processor 130 may determine the plurality of public keys based on information for confirming whether the plurality of public keys have been modulated. You can check whether the key has been tampered with. For example, if it is determined that the plurality of public keys are not tampered with, the processor 130 may generate address information used for a transaction of the first cryptocurrency using the received plurality of public keys. As another example, when it is determined that at least one of the plurality of public keys is modified, the processor 130 may display a message on the display indicating that the address information used for the transaction of the first cryptocurrency cannot be generated. .

In one embodiment, the processor 130 of the plurality of private keys stored in the plurality of external electronic devices 150, 151, the number of private keys required for the electronic signature used in the transaction of the first cryptocurrency through the address information Can be set. The processor 150 may set the number of private keys required for the electronic signature that is performed during the transaction of at least a portion of the first cryptocurrency through the generated address information. For example, the processor 130 may set the number of private keys to be equal to or less than the number of received public keys.

In one embodiment, the processor 130 may generate a smart contract to perform a set operation when a specific condition is satisfied. For example, when the electronic signature is performed using a specific condition, for example, each of the set number of private keys, the processor 130 generates a transaction message for the set operation, for example, a transaction of the first cryptocurrency. You can create a smart contract to perform The processor 130 may generate a smart contract using one private key and a plurality of public keys received from the plurality of external electronic devices 150 and 151.

For example, the processor 130 may generate a smart contract by receiving all of the set number of private keys required for performing the electronic signature from the plurality of external electronic devices 150 and 151.

As another example, when the electronic signature is performed through at least one private key among a set number of private keys required for performing the electronic signature, the processor 130 may perform a first encryption on the at least one first external electronic device. A smart contract can be created to request an electronic signature for a transaction message for the transaction of money. When the at least one first external electronic device receives a request for an electronic signature for generating a transaction message, the at least one first external electronic device performs the electronic signature using at least one private key received from the plurality of external electronic devices 150 and 151, thereby transmitting the transaction message. Can be generated.

In one embodiment, the processor 130 may control the communication circuit 110 to broadcast the generated smart contract. At least one second external electronic device operating as a node associated with the blockchain may receive the smart contract and verify the validity of the smart contract. If the validity of the smart contract is verified by at least one second external electronic device, the smart contract may be registered in the blockchain. For example, the at least one second external electronic device may store block information about the blocks of the block chain or header information of the block information. For example, the at least one second external electronic device may store block information for all blocks of the blockchain, or may store only header information of the block information without storing block information for all blocks.

In an embodiment, the processor 130 may set a plurality of sets of a plurality of private keys among a plurality of private keys from at least one third external electronic device among the plurality of external electronic devices 150 and 151 through the communication circuit 110. 1 Private key can be received. For example, the processor 130 may receive at least one third external electronic device to receive a set number of first private keys from at least one third external electronic device of the plurality of external electronic devices 150 and 151. The device may send a request for transmission of the private key.

For example, the processor 130 may transmit a request for transmission of a private key to at least one third external electronic device according to an input instructing generation of a transaction message received through the input interface 140. The at least one third external electronic device may transmit the stored private key to the electronic device 100 in response to the request for transmission of the private key. For example, the at least one third external electronic device may be selected according to a user input or may be selected according to a set algorithm.

In one embodiment, the processor 130 may perform an electronic signature using each of the plurality of first private keys received for the first transaction message generated for the transaction of the first cryptocurrency. The processor 130 may electronically sign the first transaction message using the plurality of first private keys to prove that the user who generated the first transaction message is the user of the electronic device 100.

In an embodiment, the processor 130 may transmit a first transaction message to at least one third external electronic device and request to perform an electronic signature with a private key stored in the third external electronic device. The third external electronic device may perform an electronic signature with a private key stored in the received transaction message. The at least one third external electronic device may transmit or broadcast the transaction message on which the electronic signature has been performed to the electronic device 100.

For example, when a plurality of third external electronic devices are required to perform an electronic signature on a transaction message, among the plurality of third external electronic devices that have been requested to electronically sign a transaction message and a transaction message from the electronic device 100. After performing an electronic signature, one electronic device may determine whether an electronic signature of another external electronic device is additionally required. If it is determined that an electronic signature of another external electronic device is additionally necessary, the one electronic device may forward the electronically signed transaction message to another external electronic device of the plurality of first external electronic devices after the electronic signature is performed. have. The other external electronic device performs an electronic signature using at least one private key received from the plurality of external electronic devices 150 and 151, and if it is determined that the electronic signature is not additionally necessary, the electronic message has been performed. May be transmitted or broadcasted to the electronic device 100.

In one embodiment, the processor 130 may generate at least one message for calling the generated smart contract using each of the plurality of received first private keys for the transaction of the first cryptocurrency. In addition, when the electronic contract is performed through at least one private key of the set number of private keys required for the smart contract to perform the electronic signature for generating the transaction message, the transaction message is sent to the at least one first external electronic device. When generated to request an electronic signature for the processor, the processor 130 may transmit a transaction message on which the electronic signature has been performed to the at least one first external electronic device, and request the electronic signature for the transaction message. The at least one first external electronic device generates an electronic signature or generates an electronic signature by performing an electronic signature on the received transaction message using at least one private key received from the plurality of external electronic devices 150 and 151. This can be done transactional message. The at least one first external electronic device broadcasts the generated electronic signature or the transaction message on which the electronic signature has been performed so that the at least one other external electronic device can receive or transmits the electronic signature to the electronic device 100 that has requested the electronic signature. Can be.

In one embodiment, when a plurality of first private keys are received from the at least one third external electronic device, the processor 130 based on information for confirming whether the plurality of private keys stored in the memory 120 is modulated. At least one of the plurality of first private keys may determine whether the first private key is modulated. For example, if it is determined that the plurality of first private keys are not modulated, the processor 130 may perform an electronic signature on each of the plurality of first private keys for the first transaction message. As another example, when it is determined that at least one first private key of the plurality of first private keys is modulated, the processor 130 may digitally sign the first transaction message using the plurality of first private keys. A message indicating that it is not possible can be output via the display.

In an embodiment, the plurality of private keys may be encrypted and stored in the plurality of external electronic devices 150 and 151. The processor 130 encrypts the plurality of private keys and transmits the encrypted plurality of private keys to the plurality of external electronic devices 150, 151 before transmitting the plurality of private keys to the plurality of external electronic devices 150, 151. ) Can be sent. In addition, the processor 130 may store an algorithm in the memory 120 for decrypting the plurality of encrypted private keys. In addition, the processor 130 sets authentication information for decrypting the plurality of encrypted private keys, and when the set authentication information is received, decrypts the plurality of encrypted private keys to decrypt the plurality of encrypted private keys. You can configure the algorithm.

For example, when a plurality of encrypted first private keys are received, the processor 130 may display a screen requesting authentication information for decrypting the plurality of encrypted first private keys on a display. When the processor 130 receives the first authentication information from the user through the input interface 140 and the user is authenticated corresponding to the authentication information in which the first authentication information is set, the processor 130 may decrypt the plurality of encrypted first private keys. have. The processor 130 may digitally sign each of the plurality of decrypted first private keys for the first transaction message.

As another example, if the first authentication information does not correspond to the set authentication information, the processor 130 may output a message indicating that the encrypted plurality of first private keys cannot be decrypted through the display.

In one embodiment, the processor 130 may control the communication circuit 110 to broadcast the first transaction message that has been digitally signed using each of the plurality of first private keys. At least one second external electronic device operating as a node associated with the blockchain receives the first transaction message, and the first transaction message is decrypted with a plurality of first public keys corresponding to the plurality of first private keys. 1 You can validate the transaction message. When the validity of the first transaction message is verified, the at least one second external electronic device may determine that the transaction of the first cryptocurrency confirmed through the first transaction message is a valid transaction. For example, the at least one second external electronic device may store block information about the blocks of the block chain or header information of the block information. For example, the at least one second external electronic device may store block information for all blocks of the blockchain, or may store only header information of the block information without storing block information for all blocks.

In one embodiment, the memory 120 may store a first algorithm for generating a value according to a first input received from a user through the input interface 140 and a second algorithm for generating a private key.

For example, the first algorithm may be configured to convert the received input to generate a random value when an input set by the user is received. For example, the first algorithm may generate an arbitrary first value by converting the first input when the first input is received. Further, the first algorithm may be configured to transform the first input to generate an arbitrary first value, and then convert the first input to regenerate the first value if the first input is received again. As such, the first algorithm generates a random value according to an input received first to generate a specific private key, and when the same input is received again, the value generated according to the first received input is equally regenerated. Can be.

For example, the second algorithm may be configured to generate a private key using a plurality of data received from the plurality of external electronic devices 160 and 161 and a value generated through the first algorithm. For example, the second algorithm may be configured by arbitrarily combining predetermined functions such as a union function, a hash function, a shifting function, and the like. The second algorithm may be configured in advance or may be configured every time a private key is generated. In addition, the second algorithm may be configured to generate a private key using a hash value for the plurality of data obtained through the hash function and a value generated through the first algorithm. For example, the plurality of external electronic devices 160 and 161 may include external electronic devices that operate as nodes associated with the blockchain. The plurality of external electronic devices 160 and 161 may include various electronic devices such as a smart phone, a tablet PC, a desktop PC, a server, and a wearable device.

In one embodiment, when the first input is received through the input interface 140, the processor 130 may apply the first input to the first algorithm to generate an arbitrary first value. The first algorithm may transform the first input to produce an arbitrary first value. For example, the first input may be an input first input to the first algorithm.

In an embodiment, the processor 130 may transmit the first data corresponding to the second input received through the input interface 140 and a request for transmission of the second data to the plurality of external electronic devices 160 and 161. The communication circuit 110 can be controlled. For example, the second input may be an input for referring to the first data and the second data that are targets of the transmission request. For example, the first data and the second data are data disclosed to all users, and a separate procedure for receiving the first data and the second data may not be required. For example, the first data and the second data may be part of data stored in the plurality of external electronic devices 160 and 161 based on the blockchain technology.

Hereinafter, for convenience of description, a description will be given of transmitting the transmission request for the first data and the second data to the plurality of external electronic devices 160 and 161 according to the second input, but is not limited thereto. A request for transmission of the first data and the second data may be transmitted to at least one external electronic device of the plurality of external electronic devices 160 and 161, and a request for transmission of one data or transmission of three or more data. The request may be transmitted to at least one external electronic device of the plurality of external electronic devices 160 and 161 or the plurality of external electronic devices 160 and 161.

In an embodiment, the processor 130 may receive first data and second data from the plurality of external electronic devices 160 and 161 through the communication circuit 110. The processor 130 may generate a plurality of first private keys by applying at least one of the first data and the second data and the generated first value to the second algorithm stored in the memory 120. For example, the processor 130 selects one of the first data and the second data according to the reception order of the first data and the second data, and applies the selected data and the first value to the second algorithm to apply a plurality of agents. 1 You can create a private key. However, this is only for the purpose of description and the present invention is not limited thereto, and one of the first data and the second data may be selected in various ways. As another example, the processor 130 may generate a plurality of first private keys by applying both the first data and the second data and the first value to the second algorithm.

As another example, when the first data and the second data are received, the processor 130 may obtain a first hash value and a second hash value for each of the first data and the second data by using a hash function. The processor 130 may generate a plurality of first private keys by applying at least one of the first hash value and the second hash value and the first value to the second algorithm.

In an embodiment, the processor 130 may generate a plurality of first public keys corresponding to the generated plurality of first private keys using an algorithm configured to convert the private key into a public key. In addition, the processor 130 may generate address information used for a transaction of the first cryptocurrency, using the generated plurality of first public keys. In addition, the processor 130 may set the number of private keys required for the electronic signature used in the transaction of the first cryptocurrency through the address information among the plurality of generated first public keys. The processor 150 may set the number of private keys required for the electronic signature that is performed during the transaction of at least a portion of the first cryptocurrency through the generated address information. For example, the processor 130 may set the number of private keys to be equal to or less than the number of generated public keys.

In an embodiment, the processor 130 may generate the address information using the plurality of first public keys and then discard the generated plurality of first private keys. In addition, the processor 130 transmits the generated plurality of first private keys to the plurality of external electronic devices 150 and 151 before discarding the generated plurality of first private keys, and the plurality of external electronic devices 150. 151 may store the plurality of received first private keys. The processor 130 may transmit the generated plurality of first private keys to the plurality of external electronic devices 150 and 151 without encrypting them, or encrypt the generated plurality of first private keys to provide the plurality of external electronic devices ( 150, 151 may be transmitted. For example, the processor 130 may encrypt the plurality of first private keys themselves and transmit them to the plurality of external electronic devices 150 and 151, or may transmit the plurality of first private keys using a plurality of encrypted protocols. The transmission may be transmitted to the external electronic devices 150 and 151. As another example, the processor 130 may encrypt the plurality of first private keys themselves and transmit the plurality of first private keys encrypted using an encrypted protocol to the plurality of external electronic devices 150 and 151. .

As such, when the generated plurality of first private keys are stored in the plurality of external electronic devices 150 and 151, the processor 130 may perform an electronic signature on a transaction message for a transaction of the first cryptocurrency. The plurality of first private keys may be received and used from the plurality of external electronic devices 150 and 151 without restoring the plurality of first private keys.

In one embodiment, if the first input is received again through the input interface 140 after discarding the generated plurality of first private keys, the processor 130 applies the first input to the first algorithm to apply the first value. Can be regenerated. For example, the processor 130 re-receives a first input that is identical to a first input applied to the first algorithm to generate a first value used to generate a plurality of first private keys. By applying the received first input, a first value identical to the first value used for generating the plurality of first private keys may be regenerated.

In one embodiment, after discarding the generated plurality of first private keys, the processor 130 sends a request for transmission of the first data and the second data according to the second input received again through the input interface 140. The communication circuit 110 may be controlled to transmit to the plurality of external electronic devices 160 and 161.

In an embodiment, the processor 130 may receive first data and second data from the plurality of external electronic devices 160 and 161 through the communication circuit 110. The processor 130 may restore the plurality of first private keys by applying at least one of the first data and the second data and the generated first value to the second algorithm stored in the memory 120. For example, the processor 130 may apply at least one of the first data and the second data and the first value to the second algorithm in the same manner as the method of generating the plurality of first private keys, thereby generating the plurality of first private keys. You can restore your private key.

In one embodiment, the processor 130 may perform the electronic signature using each of the plurality of first private keys restored in the first transaction message generated for the transaction of the first cryptocurrency. The processor 130 may electronically sign the first transaction message by using the plurality of restored first private keys to prove that the user who generated the first transaction message is the user of the electronic device 100. .

In one embodiment, the processor 130 may control the communication circuit 110 to broadcast the first transaction message on which the electronic signature has been performed using each of the plurality of restored first private keys. The at least one second external electronic device operating as a node associated with the blockchain receives the first transaction message, and the first transaction message is decrypted with a plurality of first public keys corresponding to the plurality of first private keys to make the first transaction. You can validate the message. When the validity of the first transaction message is verified, the at least one second external electronic device may determine that the transaction of the first cryptocurrency confirmed through the first transaction message is a valid transaction. In addition, the processor 130 may discard the plurality of restored first private keys after broadcasting the first transaction message.

As such, whenever a private key is required, the processor 130 may generate or restore the private key using the disclosed data, and discard the private key after using the generated or restored private key. Through this, the risk of leakage of the private key can be reduced, and since the user does not separately manage the private key, convenience for the user can be increased.

In the above, the processor 130 receives a plurality of public keys or a plurality of private keys from a plurality of external electronic devices 150 and 151 or generates a plurality of public information in order to generate address information or digitally sign a transaction message. Although the above description has been focused on generating a key or a plurality of private keys, the present invention is not limited thereto. The processor 130 receives some of a plurality of public keys or a plurality of private keys required for generating address information or digitally signing a transaction message from the plurality of external electronic devices 150 and 151, and generates others. can do. In addition, the processor 130 may further use at least one public key or at least one private key stored in the memory 120 to generate address information or digitally sign a transaction message.

2 is a flowchart illustrating a method of generating address information used in a cryptocurrency transaction by an electronic device according to various embodiments of the present disclosure.

Although process steps, method steps, algorithms, and the like have been described in a sequential order in the flowcharts shown in FIGS. 2-6, such processes, methods, and algorithms may be configured to operate in any suitable order. In other words, the steps of the processes, methods, and algorithms described in various embodiments of the present disclosure need not be performed in the order described in this disclosure. In addition, although some steps are described as being performed asynchronously, in some embodiments these some steps may be performed simultaneously. Moreover, illustration of the process by depiction in the figures does not mean that the illustrated process excludes other changes and modifications thereto, and any of the illustrated process or steps thereof is one of the various embodiments of the present disclosure. It is not meant to be essential to more than one, nor does it mean that the illustrated process is preferred.

In operation 210, the electronic device 100 may access the plurality of external electronic devices 150 and 151 to receive the plurality of public keys. For example, when an input for instructing generation of address information used for a transaction of cryptocurrency is received from the user through the input interface 140, the processor 130 uses a plurality of connection information stored in the memory 120. The communication circuit 110 may be controlled to connect to the external electronic devices 150 and 151. In addition, when authentication information about a user is required to access the plurality of external electronic devices 150 and 151, the processor 130 may display a screen for requesting input of the authentication information through a display. The processor 130 may control the communication circuit 110 to access the plurality of external electronic devices 150 and 151 using authentication information received through the input interface 140 and connection information stored in the memory 120. have.

In operation 220, the electronic device 100 may receive a plurality of public keys from the plurality of external electronic devices 150 and 151. For example, when the processor 130 is connected to the plurality of external electronic devices 150 and 151, the processor 130 may request transmission of a public key stored in each of the plurality of external electronic devices 150 and 151. The processor 130 may receive, via the communication circuit 110, a plurality of public keys transmitted by each of the plurality of external electronic devices 150 and 151 in response to the public key transmission request.

In operation 230, the electronic device 100 may generate address information used for a transaction of the first cryptocurrency using the received plurality of public keys. For example, the processor 130 uses the public key to generate address information used for the transaction of the cryptocurrency, and the address information used for the transaction of the first cryptocurrency using the received plurality of public keys. Can be generated.

In operation 240, the electronic device 100 may set the number of private keys required for the electronic signature used in the transaction of the first cryptocurrency. For example, the processor 130 is required for the electronic signature used in the transaction of the first cryptocurrency through the address information generated in step 20 of the plurality of private keys stored in the plurality of external electronic devices 150 and 151. You can set the number of private keys. For example, the processor 130 may set the number of private keys to be equal to or less than the number of received public keys. For example, when the number of the plurality of public keys received is a, the processor 130 may not exceed the number of private keys required for the electronic signature used in the transaction of the first cryptocurrency through the generated address information. It can be set to b, the number of.

3 is a flowchart illustrating a method of operating an electronic device according to whether a public key is modulated according to various embodiments of the present disclosure.

In operation 310, when a plurality of public keys are received, the electronic device 100 determines whether at least one public key of the plurality of public keys has been tampered with before generating address information used for a transaction of the first cryptocurrency. Can be. For example, the processor 130 may check whether the received plurality of public keys is modulated based on information for confirming whether the plurality of public keys are stored in the memory 120. When a plurality of public keys have been modulated, a plurality of private keys corresponding to the plurality of public keys may have been modulated. Therefore, it is necessary to confirm whether or not the plurality of public keys have been modulated before generating address information.

In operation 320, when the plurality of public keys is tampered with, the electronic device 100 may display a message indicating that the address information used for the transaction of the first cryptocurrency cannot be generated using the received plurality of public keys. Can be. For example, if it is determined that at least one of the plurality of public keys has been tampered with, the processor 130 may display a message on the display indicating that the address information used for the transaction of the first cryptocurrency cannot be generated. . In addition, when it is determined that at least one of the plurality of public keys is modulated, the processor 130 may be stored in at least one external electronic device storing at least one public key whose modulation is confirmed among the plurality of external electronic devices 150 and 151. Information on the display can be displayed. In this way, the user may not use at least one public key stored in the at least one external electronic device to generate address information, or may cause the new private key and the public key to be stored again in the at least one external electronic device.

In operation 330, when it is determined that the plurality of public keys are not modulated, the electronic device 100 may generate address information used for a transaction of the first cryptocurrency using the received plurality of public keys. For example, when it is determined that the plurality of public keys are not tampered with, the processor 130 uses the received plurality of public keys according to an algorithm for generating address information used for a transaction of a cryptocurrency using the public key. To generate address information used for the transaction of the first cryptocurrency. In addition, the processor 130 may display the generated address information on the display and store the generated address information in the memory 120.

4 is a flowchart of a method for broadcasting a transaction message by an electronic device according to various embodiments of the present disclosure.

In operation 410, the electronic device 100 may receive a set number of first private keys among a plurality of private keys from at least one third external electronic device among the plurality of external electronic devices 150 and 151. have. For example, the processor 130 may receive at least one third external electronic device to receive a set number of first private keys from at least one third external electronic device of the plurality of external electronic devices 150 and 151. The device may send a request for transmission of the private key.

For example, the at least one third external electronic device may be selected from among the plurality of external electronic devices 150 and 151 according to a user's input. The processor 130 may transmit a transmission request for the private key to the selected at least one third external electronic device. As another example, the at least one third external electronic device may be selected from among the plurality of external electronic devices 150 and 151 according to a set algorithm, and the set number of external electronic devices from among the plurality of external electronic devices 150 and 151. May be arbitrarily selected.

In operation 420, the electronic device 100 may perform an electronic signature using each of the plurality of first private keys received for the first transaction message generated for the transaction of the first cryptocurrency. For example, the processor 130 may digitally sign the first transaction message by using the plurality of first private keys to prove that the user who generated the first transaction message is the user of the electronic device 100. Can be.

For example, the processor 130 may determine whether at least one of the first private keys of the plurality of first private keys is modulated based on information for confirming whether the plurality of private keys are stored in the memory 120. Can be. When it is confirmed that the plurality of first private keys are not modulated, the processor 130 may digitally sign each of the plurality of first private keys using the first transaction message. As another example, when it is determined that at least one first private key of the plurality of first private keys is modulated, the processor 130 may digitally sign the first transaction message using the plurality of first private keys. A message indicating that it is not possible can be output via the display.

In operation 430, the electronic device 100 may broadcast the first transaction message on which the electronic signature is performed using each of the plurality of first private keys. For example, the processor 130 may control the communication circuit 110 to broadcast the first transaction message on which the electronic signature is performed using each of the plurality of first private keys.

5 is a flowchart illustrating an address generation method used for a cryptocurrency transaction by an electronic device according to various embodiments of the present disclosure.

In operation 510, the electronic device 100 may receive a first input from a user. For example, when a first input is received through the input interface 140, the processor 130 may determine whether the received first input corresponds to a set input.

In operation 520, the electronic device 100 may generate an arbitrary first value by converting the first input. For example, if the first input corresponds to a set input, the processor 130 may generate an arbitrary first value by applying the first input to the first algorithm.

In operation 530, the electronic device 100 may receive a second input from the user. For example, the second input may be an input for referring to the first data and the second data that are targets of the transmission request. In addition, the second input may refer to the first data and the external electronic device that requests the second data. When the second input is received through the input interface 140, the processor 130 may check the first data and the second data according to the second input. In addition, the processor 130 may identify the first external electronic device 501 and the second external electronic device 502 that request the first data and the second data according to the second input.

In operation 531, the electronic device 100 transmits a transmission request for the first data to the first external electronic device 501 according to the received second input. In operation 532, the electronic device 100 transmits a transmission request for the second data. It may transmit to the second external electronic device 502. The processor 130 transmits a request for transmission of the first data to the first external electronic device 501 based on the second input, and transmits a request for transmission of the second data to the second external electronic device 502. The communication circuit 110 can be controlled to do so. For example, the first external electronic device 501 and the second external electronic device 502 may include external electronic devices that operate as nodes associated with the blockchain.

In addition, although not shown, the processor 130 may transmit a request for transmission of at least one data not referred to by the second input to at least one other external electronic device and receive at least one data. For example, the processor 130 may not use the received at least one data to generate address information used for the transaction of the first cryptocurrency. In this way, it is possible to prevent other users from knowing what data is used to generate address information used in the transaction of the first cryptocurrency, thereby preventing the private key from being leaked by another user. .

In operation 540, in response to the request for transmitting the first data, the first external electronic device 501 may retrieve the first data and transmit the first data to the electronic device 100. In operation 541, the second external electronic device 502 may retrieve the second data and transmit the second data to the electronic device 100 in response to the request for transmission of the second data.

In addition, although not shown, steps 530 to 541 may be repeated a predetermined number of times in order to enhance security of the private key generation method. In other words, the number of data used to generate the private key may be two or more depending on the setting.

In operation 550, the electronic device 100 may generate a plurality of first private keys using at least one of the received first data and the second data and the generated first value. For example, the processor 130 may generate a plurality of first private keys by applying at least one of the first data and the second data and the generated first value to a second algorithm stored in the memory 120. For example, the processor 130 may store the generated plurality of first private keys in the secure area of the memory 120. For example, the security area of the memory 120 may be an area logically divided to prevent access of at least one component of the electronic device 100 to which the right is not authorized.

In addition, after generating a plurality of first private keys, the processor 130 may discard the first data, the second data, and the first value. For example, the processor 130 may delete the first data, the second data, and the first value stored in the memory 120.

In operation 560, the electronic device 100 may generate address information used for a transaction of the first cryptocurrency using the generated plurality of first private keys. For example, the processor 130 may generate a plurality of first public keys corresponding to the generated plurality of first private keys by using an algorithm configured to convert the private key into a public key. In addition, the processor 130 may generate address information used for a transaction of the first cryptocurrency, using the generated plurality of first public keys. In addition, the processor 130 may set the number of private keys required for the electronic signature that is performed during the transaction of at least a portion of the first cryptocurrency through the generated address information.

In operation 570, the electronic device 100 may discard the plurality of first private keys. For example, the processor 130 may generate the address information using the plurality of first public keys and then discard the plurality of first private keys. For example, the processor 130 may delete the plurality of first private keys stored in the secure area of the memory 120. As such, the electronic device 100 may prevent the generated plurality of first private keys from being repeatedly used and restore and use the private key whenever a private key is needed in a transaction of a cryptocurrency. The method of restoring the private key will be described later.

6 is a flowchart of a method for broadcasting a transaction message by an electronic device according to various embodiments of the present disclosure.

In operation 610, the electronic device 100 may receive a first input from a user. For example, the processor 130 may discard the plurality of generated first private keys and then receive the first input corresponding to the input set through the input interface 140 again.

In operation 620, the electronic device 100 may generate a first value by converting the first input. For example, the processor 130 may regenerate the first value by applying the first input to the first algorithm. For example, the first algorithm may be configured to transform the first input to generate an arbitrary first value, and then, if the first input is received again, convert the first input to generate the first value.

In operation 630, the electronic device 100 may receive a second input from the user. For example, the processor 130 may confirm the first data and the second data according to the second input received again after discarding the plurality of first private keys. In addition, the processor 130 may identify the first external electronic device 601 and the second external electronic device 602 that request the first data and the second data according to the second input received again.

In operation 631, the electronic device 100 transmits a transmission request for the first data to the first external electronic device 601 according to the second input. In operation 632, the electronic device 100 transmits a transmission request for the second data. It can transmit to the external electronic device 602. The processor 130 transmits a transmission request for the first data identified according to the second input to the first external electronic device 601 and transmits a transmission request for the second data identified according to the second input to the second external. The communication circuit 110 may be controlled to transmit to the electronic device 602. For example, the first external electronic device 601 and the second external electronic device 602 may include external electronic devices that operate as nodes associated with the blockchain.

In addition, although not shown, the processor 130 may transmit a request for transmission of at least one data not referred to by the second input to at least one other external electronic device and receive at least one data. For example, the processor 130 may not use the received at least one data to generate address information used for the transaction of the first cryptocurrency. In this way, it is possible to prevent other users from knowing what data is used to generate address information used in the transaction of the first cryptocurrency, thereby preventing the private key from being leaked by another user. .

In operation 640, the first external electronic device 601 may retrieve the first data and transmit the first data to the electronic device 100 in response to the request for transmission of the first data. In operation 641, the second external electronic device 602 may search for and transmit the second data to the electronic device 100 in response to the request for transmission of the second data.

In addition, although not shown, in order to enhance security of the private key generation method, steps 630 to 641 may be repeated a predetermined number of times. In other words, the number of data used to generate the private key may be two or more depending on the setting.

In operation 650, the electronic device 100 may restore the plurality of first private keys using at least one of the received first data and the second data and the generated first value. For example, the processor 130 may restore the plurality of first private keys by applying at least one of the first data and the second data and the generated first value to the second algorithm stored in the memory 120. The number of the plurality of first private keys to be restored may be the number of private keys required for an electronic signature performed at the time of the transaction of at least a portion of the first cryptocurrency, which is set when generating address information used for the transaction of the first cryptocurrency. .

In operation 660, the electronic device 100 may perform an electronic signature by using each of the plurality of first private keys restored in the first transaction message generated for the transaction of the first cryptocurrency. For example, the processor 130 generates a first transaction message for a transaction of the first cryptocurrency according to a user's input, and digitally signs each of the plurality of first private keys restored in the first transaction message. Can be performed.

In operation 670, the electronic device 100 may broadcast the first transaction message. For example, the processor 130 may control the communication circuit 110 to broadcast the first transaction message on which the electronic signature is performed using each of the restored plurality of first private keys.

In operation 680, the electronic device 100 may discard the plurality of restored first private keys. For example, the processor 130 may digitally sign the first transaction message using each of the plurality of first private keys and then discard the plurality of restored first private keys. As such, the electronic device 100 may prevent the generated plurality of second private keys from being repeatedly used, and restore and use the private key whenever a private key is required in a transaction of a cryptocurrency.

Although the method has been described through specific embodiments, the method may also be embodied as computer readable code on a computer readable recording medium. Computer-readable recording media include all kinds of recording devices that store data that can be read by a computer system. Examples of computer-readable recording media may include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like. The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion. In addition, functional programs, codes, and code segments for implementing the above embodiments can be easily inferred by programmers in the art to which the present disclosure belongs.

While the technical spirit of the present disclosure has been described with reference to some embodiments and the examples shown in the accompanying drawings, the technical spirit and scope of the present disclosure may be understood by those skilled in the art. It will be appreciated that various substitutions, modifications, and alterations can be made in the scope. Also, such substitutions, modifications and variations are intended to be included within the scope of the appended claims.

Claims (20)

An electronic device for performing a transaction of a blockchain-based cryptocurrency, A communication circuit connected through a network to communicate with a plurality of external electronic devices, each of which stores a plurality of private keys and a plurality of public keys corresponding to the plurality of private keys; A memory storing connection information for connecting to the plurality of external electronic devices; And A processor electrically connected with the memory and the communication circuit, The processor, Control the communication circuit to connect to the plurality of external electronic devices using the connection information; Receive the plurality of public keys from the plurality of external electronic devices through the communication circuit, Using the plurality of public keys, generate address information used in a transaction of a first cryptocurrency, And setting the number of private keys required for the electronic signature used in the transaction of the first cryptocurrency through the address information among the plurality of private keys. The method of claim 1, The number of the private keys is set to be equal to or less than the number of the received plurality of public keys. The method of claim 1, An input interface for receiving authentication information used to access the plurality of external electronic devices from a user More, The processor, And control the communication circuit to connect to the plurality of external electronic devices using the connection information and the authentication information received through the input interface. The method of claim 1, The memory, Further stores information for confirming whether the plurality of public keys have been tampered with, The processor, When the plurality of public keys is received, based on information for confirming whether the plurality of public keys have been modulated, confirm whether the plurality of public keys have been modulated, And if it is confirmed that the plurality of public keys has not been tampered with, generating the address information using the plurality of public keys. The method of claim 1, The processor, When the electronic signature is performed using each of the set number of private keys among the plurality of private keys, a smart contract is generated to generate a transaction message for the transaction of the first cryptocurrency. , And control the communication circuit to broadcast the generated smart contract. The method of claim 1, The processor, Receiving, from the at least one external electronic device of the plurality of external devices, the set number of the plurality of first private keys of the plurality of private keys through the communication circuit, Digitally sign a first transaction message generated for the transaction of the first cryptocurrency using each of the plurality of first private keys, And control the communication circuit to broadcast a first transaction message on which an electronic signature has been performed using each of the plurality of first private keys. The method of claim 6, The at least one external electronic device is selected according to a user's input or a set algorithm. The method of claim 6, The processor, When the plurality of first private keys is received, based on information for confirming whether the plurality of private keys are modulated, the first private key is checked for modification, and And if it is confirmed that the plurality of first private keys have not been tampered with, performing electronic signature on each of the plurality of first private keys with respect to the first transaction message. The method of claim 6, The plurality of private keys are encrypted and stored in the plurality of external electronic devices, The processor, When the user is authenticated through authentication information input from the user, the plurality of first private keys are decrypted, And electronically sign each of the plurality of decrypted first private keys for the first transaction message. A non-transitory computer readable recording medium having recorded thereon a program for running on a computer, comprising: When the program is executed by a processor, the processor, Obtaining access information for accessing a plurality of private electronic devices and a plurality of external electronic devices in which a plurality of public keys corresponding to the plurality of private keys are stored; Accessing the plurality of external electronic devices using the connection information, and receiving the plurality of public keys from the plurality of external electronic devices; Generating address information used for a transaction of a first cryptocurrency, using the plurality of public keys; And Setting the number of private keys required for the electronic signature used in the transaction of the first cryptocurrency through the address information among the plurality of private keys And a computer readable recording medium comprising executable instructions for causing the computer to perform the operation. The method of claim 10, The executable command is: Generating a smart contract to generate a transaction message for a transaction of the first cryptocurrency when the electronic signature is performed using each of the set number of private keys among the plurality of private keys A computer readable recording medium for further performing. The method of claim 10, The executable command is: Receiving the set number of first private keys of the plurality of private keys from at least one external electronic device among the plurality of external devices; Digitally signing each of the plurality of first private keys for a first transaction message generated for the transaction of the first cryptocurrency; And Broadcasting a first transaction message having been digitally signed using each of the plurality of first private keys A computer readable recording medium for further performing. The method of claim 10, Generating address information used for the transaction of the first cryptocurrency, When the plurality of public keys is received, determining whether the plurality of public keys are modulated based on information for confirming whether the plurality of public keys have been modulated; And If it is confirmed that the plurality of public keys have not been tampered with, generating address information used for a transaction of the first cryptocurrency using the plurality of public keys Computer-readable recording medium comprising a. In the method for generating address information used in a blockchain-based cryptocurrency transaction, Obtaining access information for accessing a plurality of private electronic devices and a plurality of external electronic devices in which a plurality of public keys corresponding to the plurality of private keys are stored; Accessing the plurality of external electronic devices using the connection information, and receiving the plurality of public keys from the plurality of external electronic devices; Generating address information used for a transaction of a first cryptocurrency, using the plurality of public keys; And Setting the number of private keys required for the electronic signature used in the transaction of the first cryptocurrency through the address information among the plurality of private keys Address information generation method comprising a. An electronic device for performing a transaction of a blockchain-based cryptocurrency, An input interface for receiving input from a user; Communication circuitry for communicating with at least one external electronic device connected through a network; A memory for storing a first algorithm for generating a value according to an input received through the input interface and a second algorithm for generating a private key; And A processor electrically connected with the input interface, the communication circuitry and the memory, The processor, When a first input is received through the input interface, the first input is applied to the first algorithm to generate a first value. Control the communication circuit to transmit to the at least one external device a transmission request for first data and second data corresponding to a second input received through the input interface, Receive the first data and the second data from the at least one external electronic device through the communication circuit; Generating a plurality of first private keys by applying at least one of the first data and the second data and the first value to the second algorithm, And a plurality of first public keys corresponding to the plurality of first private keys to generate address information used for a transaction of the first cryptocurrency. The method of claim 15, The processor, Setting the number of private keys required for the electronic signature used in the transaction of the first cryptocurrency through the address information among the plurality of first private keys, The number of the private keys is set to be equal to or less than the number of the generated first public keys. The method of claim 15, The processor, After generating the address information, discarding the generated plurality of first private keys. The method of claim 15, The processor, If the first input is received again through the input interface, the first value is applied to the first algorithm to regenerate the first value, Control the communication circuit to transmit to the at least one external device the transmission request for the first data and the second data corresponding to the second input re-received through the input interface, Receive the first data and the second data from the at least one external electronic device through the communication circuit; Applying the at least one of the first data and the second data and the first value to the second algorithm to restore the plurality of first private keys, Digitally sign each of the plurality of restored first private keys for a first transaction message generated for the transaction of the first cryptocurrency, And control the communication circuit to broadcast a first transaction message with an electronic signature performed using each of the plurality of restored first private keys. The method of claim 18, The processor, And after broadcasting the first transaction message, discarding the plurality of restored first private keys. The method of claim 15, The processor, Obtaining a first hash value and a second hash value for each of the first data and the second data using a hash function, And generating the plurality of first private keys by applying at least one of the first hash value and the second hash value and the first value to the second algorithm.

Images