TWI813914B - Evidence collection system and evidence collection method based on blockchain - Google Patents

Abstract

An evidence collection system and an evidence collection method based on a blockchain are provided. The evidence collection system includes a mobile device and a server. The mobile device pre-stores an evidence collection application, wherein the mobile device collects multimedia data through the evidence collection application, wherein the evidence collection application inhibits the mobile device from editing the multimedia data and storing the multimedia data. The server communicatively connects to the mobile device, wherein the mobile device uploads the multimedia data to the server, wherein the server upload the multimedia data to the blockchain.

Description

Blockchain-based evidence collection and storage system and evidence collection and storage method

This disclosure is about a blockchain-based evidence collection and storage system and evidence collection and storage method.

With the advancement of science and technology and the improvement of environmental awareness, more and more industries are replacing written documents with electronic documents. However, for the evidence collection and storage system, it is very important that the data cannot be tampered with. If the possibility of tampering with electronic documents cannot be eliminated, it will be difficult for people to trust electronic documents containing evidence.

This disclosure provides a blockchain-based evidence collection and storage system and evidence collection and storage method, which can prevent multimedia materials used as evidence from being tampered with.

This disclosure discloses a blockchain-based evidence collection and storage system, including a mobile device and a server. The mobile device pre-stores the forensic application, wherein the mobile device collects multimedia data through the forensic application, and the forensic application prohibits the mobile device from editing multimedia data and storing multimedia data. The server communication is connected to the mobile device, where the mobile device uploads multimedia data to the server, where the server uploads the multimedia data to the blockchain.

In an embodiment of the present disclosure, the above-mentioned multimedia data includes at least one of the following: audio, image, video, positioning information, time information and identity information.

In an embodiment of the present disclosure, the above-mentioned identity information includes at least one of the following: International Mobile Subscriber Identity Code, User Identification Module Code, International Mobile Device Identity Code, mobile phone number, ID number or passport number.

In an embodiment of the present disclosure, the above positioning information includes at least one of the following: global positioning system information and mobile network information.

In an embodiment of the present disclosure, the above-mentioned server communication is connected to multiple access points, and the mobile device is triangulated through the multiple access points to obtain positioning information corresponding to the multimedia data.

In one embodiment of the present disclosure, the above-mentioned server stores a query application, wherein the server receives a query command from an external electronic device, wherein the query application determines whether the external electronic device is authorized according to the query command, and responds to the external electronic device The multimedia information in the blockchain is accessed through the transceiver with authorization, and the multimedia information is transmitted to the external electronic device through the transceiver.

In an embodiment of the present disclosure, the above-mentioned global positioning system information includes latitude and longitude information, wherein the server corrects the latitude and longitude information based on mobile network information.

In an embodiment of the present disclosure, the above-mentioned forensic application includes a user interface, wherein the forensic application accesses multimedia data through the server and displays the multimedia data through the user interface.

In one embodiment of the present disclosure, the above-mentioned user interface includes a calendar, wherein the user interface displays multimedia data associated with the date in response to a date in the calendar being selected.

The disclosure of a blockchain-based evidence collection and storage method is suitable for a certificate collection and storage system including a mobile device and a server. The evidence collection and storage method includes: pre-storing a certificate collection application from the mobile device; Collect multimedia data through a forensic application, where the forensic application prohibits the mobile device from editing multimedia data and storing multimedia data; the mobile device uploads multimedia data to the server; and the server uploads the multimedia data to the blockchain.

Based on the above, in summary, the disclosed evidence collection application can prevent multimedia data from being tampered with during the evidence collection stage, and can also prevent multimedia data in storage from being tampered with.

In order to make the content of the present disclosure easier to understand, the following embodiments are provided as examples according to which the present disclosure can be implemented. In addition, wherever possible, elements/components/steps with the same reference numbers in the drawings and embodiments represent the same or similar parts.

FIG. 1 illustrates a schematic diagram of a certificate collection and storage system 10 and a blockchain 300 according to an embodiment of the present disclosure. The evidence collection and storage system 10 based on the blockchain 300 can be used to collect multimedia data as evidence, and can prevent the multimedia data from being tampered with. The evidence collection and storage system 10 may include a mobile device 100 and a server 200 . The mobile device 100 can be communicatively connected to the server 200, and the server 200 can be connected to the blockchain 300 to access data in the blockchain 300.

FIG. 2 is a schematic diagram of a mobile device 100 according to an embodiment of the present disclosure. The mobile device 100 is, for example, a smart phone or a tablet computer, and the present disclosure is not limited thereto. The mobile device 100 may include a processor 110, a storage medium 120, a transceiver 130, a human-machine interface 140, and a sensor 150.

The processor 110 is, for example, a central processing unit (CPU), or other programmable general-purpose or special-purpose micro control unit (MCU), microprocessor, or digital signal processing unit. Digital signal processor (DSP), programmable controller, application specific integrated circuit (ASIC), graphics processing unit (GPU), image signal processor (ISP) ), image processing unit (IPU), arithmetic logic unit (ALU), complex programmable logic device (CPLD), field programmable gate array (field programmable gate array) , FPGA) or other similar components or a combination of the above components. The processor 110 may be coupled to the storage medium 120, the transceiver 130, the human-machine interface 140, and the sensor 150, and access and execute multiple modules and various applications stored in the storage medium 120.

The storage medium 120 is, for example, any type of fixed or removable random access memory (RAM), read-only memory (ROM), or flash memory. , hard disk drive (HDD), solid state drive (SSD) or similar components or a combination of the above components, used to store multiple modules or various application programs that can be executed by the processor 110 . In this embodiment, the storage medium 120 can store the evidence collection application 121, the function of which will be described later.

The transceiver 130 transmits and receives signals in a wireless or wired manner. Transceiver 130 may also perform, for example, low noise amplification, impedance matching, mixing, up or down frequency conversion, filtering, amplification, and similar operations.

The human-machine interface 140 may include an input interface and an output interface. The input interface may include, for example, a touch display or a keyboard. The output interface may include, for example, a display.

The sensor 150 is used to collect multimedia data. The sensor 150 may include a camera 151 and a microphone 152 .

FIG. 3 is a schematic diagram of a server 200 according to an embodiment of the present disclosure. The server 200 may include a processor 210, a storage medium 220, and a transceiver 230.

The processor 210 is, for example, a central processing unit, or other programmable general-purpose or special-purpose micro-control unit, microprocessor, digital signal processor, programmable controller, special application integrated circuit, or graphics processor. , image signal processor, image processing unit, arithmetic logic unit, complex programmable logic device, field programmable logic gate array or other similar components or a combination of the above components. The processor 210 can be coupled to the storage medium 220 and the transceiver 230, and access and execute multiple modules and various applications stored in the storage medium 220.

The storage medium 220 is, for example, any type of fixed or removable random access memory, read-only memory, flash memory, hard disk, solid state drive or similar components or a combination of the above components. A plurality of modules or various application programs that can be executed by the processor 210 are stored. In this embodiment, the storage medium 220 can store the query application 221, the function of which will be described later.

The transceiver 230 transmits and receives signals in a wireless or wired manner. Transceiver 230 may also perform, for example, low noise amplification, impedance matching, mixing, up or down frequency conversion, filtering, amplification, and similar operations.

Referring to FIGS. 2 and 3 , the mobile device 100 can collect multimedia data through the forensic application 121 . Specifically, the user can input instructions to the evidence collection application 121 through the human-machine interface 140 to instruct the evidence collection application 121 to receive multimedia data. The forensic application 121 can collect multimedia data through the sensor 150 . For example, multimedia materials may include images or videos. The forensic application 121 may collect images or videos through the camera 151 . As another example, multimedia data may include audio. Evidence collection application 121 may collect audio via microphone 152 .

In one embodiment, the multimedia data may include positioning information. For example, the forensic application 121 may receive via the transceiver 130 . For example, signals containing positioning information (such as Global Positioning System signals) sent by satellites or base stations, and positioning information is added to the multimedia data when the multimedia data is generated. The positioning information may include global positioning system information (global positioning system, GPS) or mobile network information (IP (Internet protocol) address or cell identification code (Cell ID)), where the global positioning system information may include latitude and longitude information. When the positioning information includes both global positioning system information or mobile network information, the verification application 121 can correct the latitude and longitude information according to the mobile network information to obtain more accurate latitude and longitude information. In other words, mobile network information can be used as secondary positioning information to GPS information.

In one embodiment, the multimedia data may include time information. For example, the forensic application 121 may receive via the transceiver 130 . For example, signals containing time information (such as Global Positioning System signals) sent by satellites or base stations, and time information is added to the multimedia data when the multimedia data is generated.

In one embodiment, the multimedia data may include identity information corresponding to the mobile device 100 , where the identity information may include an international mobile subscriber identity (IMSI) or a subscriber identity module (SIM). , international mobile equipment identity (IMEI), mobile subscriber ISDN number (MSISDN), identity card number (identity, ID) or passport number. The identity information may be pre-stored in the storage medium 120 of the mobile device 100 .

In one embodiment, the multimedia data may include specification information corresponding to the mobile device 100 , where the specification information includes, for example, information such as the brand of the mobile device 100 . The specification information may be pre-stored in the storage medium 120 of the mobile device 100 .

The forensic application 121 may prohibit the mobile device 100 from editing multimedia data or storing multimedia data. After collecting the multimedia data, the mobile device 100 can only upload the multimedia data to the server 200 . This ensures that multimedia materials are not tampered with during the evidence collection stage.

The server 200 can receive multimedia data from the mobile device 100 and upload the multimedia data to the blockchain 300 . Multimedia data stored in the blockchain 300 will not be tampered with.

In one embodiment, the server 200 may obtain positioning information corresponding to the multimedia data. Specifically, the server 200 may be communicatively connected to a plurality of access points, wherein each of the plurality of access points may be communicatively connected to the mobile device 100 . The server 200 can triangulate the mobile device 100 through the plurality of access points to obtain positioning information corresponding to the multimedia data.

When the user wants to query the multimedia data stored in the blockchain 300, the user can send a query command to the server 200 through a terminal device (such as the mobile device 100 or an external electronic device). The query application 221 of the server 200 can receive the query command from the terminal device through the transceiver 230 . The query application 221 can determine whether the terminal device is authorized according to the query command. If the terminal device is authorized, the query application 221 can access the multimedia data in the blockchain 300 through the transceiver 230, and transmit the multimedia data to the terminal device that issued the query command through the transceiver 230. In one embodiment, the query command may include identity information corresponding to the terminal device (eg, International Mobile Subscriber Identity Code or User Identification Module Code). The storage medium 220 of the server 200 can pre-store the white list. After the server 200 receives the query command, the server 200 may determine that the terminal device is authorized in response to the identity information of the terminal device matching the whitelist, that is, the terminal device has the authority to access the multimedia data in the blockchain 300 .

The forensic application 121 of the mobile device 100 may include a user interface, which the forensic application 121 may display through the human-machine interface 140 . After the forensic application 121 accesses the multimedia data stored in the blockchain 300 through the server 200, the forensic application 121 can display or play the multimedia data through the user interface.

In one embodiment, the user interface may include a calendar. When the user wants to access multimedia data on a specific date, the user can select the date in the calendar in the user interface through the human-machine interface 140 . The user interface may display multimedia data associated with a date in the calendar in response to the date being selected. In addition, the user interface can further display cartographic information related to the positioning information in the multimedia data. Accordingly, the user can quickly determine the location of the event related to the multimedia data through the user interface.

FIG. 4 illustrates a flow chart of a method for collecting and storing evidence according to an embodiment of the present disclosure, wherein the method for collecting and storing evidence can be implemented by the evidence collecting and storing system 10 shown in FIG. 1 . In step S401, the certification collection application is pre-stored on the mobile device. In step S402, multimedia data is collected by the mobile device through an authentication application, where the authentication application prohibits the mobile device from editing multimedia data and storing multimedia data. In step S403, the mobile device uploads multimedia data to the server. In step S404, the server uploads the multimedia data to the blockchain.

To sum up, the evidence collection application of the present disclosure can prohibit the mobile device used for evidence collection from editing the collected multimedia data, thereby preventing the multimedia data from being tampered with by the evidence collector. Multimedia data sent from mobile devices to servers can be stored in the blockchain to prevent tampering with the stored multimedia data. When the external electronic device sends a query command to the server, the server can determine whether the external electronic device has the authority to access multimedia data. If the external electronic device does not have permission, the server may prohibit the external electronic device from accessing the multimedia data in the blockchain.

10: Evidence collection and storage system 100:Mobile device 110, 210: Processor 120, 220: Storage media 121: Evidence collection application 130, 230: transceiver 140: Human-computer interface 150: Sensor 151:Camera 152:Microphone 200:server 221: Query application 300:Blockchain S401, S402, S403, S404: steps

FIG. 1 illustrates a schematic diagram of a certificate collection and storage system and a blockchain according to an embodiment of the present disclosure. FIG. 2 is a schematic diagram of a mobile device according to an embodiment of the present disclosure. FIG. 3 is a schematic diagram of a server according to an embodiment of the present disclosure. FIG. 4 illustrates a flow chart of a method for collecting and storing evidence according to an embodiment of the present disclosure.

10: Evidence collection and storage system

100:Mobile device

200:server

300:Blockchain

Claims (9)

A blockchain-based evidence collection and storage system, including: a mobile device, pre-stored evidence collection application, wherein the mobile device collects multimedia data through the evidence collection application, wherein the evidence collection application prohibits the mobile A device edits the multimedia data and stores the multimedia data; and a server is communicatively connected to the mobile device, wherein the mobile device uploads the multimedia data to the server, wherein the server uploads the multimedia data to the server. Multimedia data is uploaded to the blockchain, wherein the multimedia data stored in the blockchain cannot be tampered with, wherein the server includes a query application, and wherein the server receives query instructions from an external electronic device, Wherein the query command includes identity information corresponding to the external electronic device, wherein the query application determines whether the external electronic device is authorized according to the query command, and responds to the external electronic device being authorized by The transceiver accesses the multimedia information in the blockchain, and transmits the multimedia information to the external electronic device through the transceiver, wherein the server pre-stores a whitelist, wherein the server After the server receives the query command, the server determines that the external electronic device is authorized in response to the identity information of the external electronic device matching the white list. The evidence collection and storage system of claim 1, wherein the multimedia data includes at least one of the following: information, images, videos, positioning information, time information and the identity information. The certificate collection and storage system as described in claim 1, wherein the identity information includes at least one of the following: international mobile subscriber identification code, user identification module code, international mobile device identification code, mobile phone number, identity Certificate number or passport number. The certificate collection and storage system as described in claim 2, wherein the positioning information includes at least one of the following: global positioning system information and mobile network information. The certificate collection and storage system of claim 1, wherein the server is connected to multiple access points through communication, and the mobile device is triangulated through the multiple access points to obtain information corresponding to the multimedia Location information for the data. The certificate collection and storage system of claim 4, wherein the global positioning system information includes latitude and longitude information, and the server corrects the longitude and latitude information based on the mobile network information. The evidence collection and storage system of claim 2, wherein the evidence collection application includes a user interface, wherein the evidence collection application accesses the multimedia data through the server, and through the user The interface displays the multimedia data. The evidence collection and certification system of claim 7, wherein the user interface includes a calendar, wherein the user interface displays the multimedia data associated with the date in response to a date in the calendar being selected. . A blockchain-based evidence collection and storage method is suitable for a certificate collection and storage system including a mobile device and a server, wherein the evidence collection and storage method includes: pre-storing a certificate collection application on the mobile device; Multimedia data is collected by the mobile device through the forensic application, wherein the forensic application prohibits the mobile device from editing the multimedia data and storing the multimedia data; uploading the multimedia data by the mobile device to the server, wherein the server includes a query application; the server uploads the multimedia data to the blockchain, wherein the multimedia data stored in the blockchain cannot be tampered with ; The server receives a query command from an external electronic device, wherein the query command includes identity information corresponding to the external electronic device; and the query application determines whether the external electronic device is based on the query command. authorized, and in response to the external electronic device being authorized to access the multimedia information in the blockchain and transmitting the multimedia information to the external electronic device, wherein the query application performs the The step of the query command to determine whether the external electronic device is authorized includes: having the server pre-store a whitelist; and after the server receives the query command, the server responds to the external The identity information of the electronic device matches the white list to determine that the external electronic device is authorized.