KR20060128072A - D.R.M based package contents providing method and apparatus therefor - Google Patents

Abstract

The present invention relates to an apparatus and method for providing DRM-based package contents, and further comprising a method for detecting the one or more individual contents in response to a purchase request for package contents including one or more individual contents. 1 course; A second step of generating one package use right that the detected individual contents will use in common; Encrypting each of the individual contents; Generating content transmission information including the encrypted individual contents and a right to use a package; A fifth process of decrypting the requested individual contents by using the package permission in response to the execution request of one of the individual contents included in the package contents; And a sixth process of executing the decrypted individual content. Accordingly, the present invention can increase the memory usage efficiency of the terminal by storing only one package use right in the corresponding terminal even if the package content includes a plurality of digital contents. Since it is not necessary to grant the same number of usage rights as the number, the load of the package content providing server due to the use authority can be reduced.

Description

D. R.M-based package content providing method and apparatus therefor {METHOD AND APPARATUS FOR PROVIDING PACKAGE CONTENTS USING D.R.M}

1 is a schematic configuration diagram of a D.M.M-based content providing system,

2 is a schematic block diagram of a D.M.M-based package content providing server according to an embodiment of the present invention;

3 is an exemplary diagram of a database structure for managing individual content in a package content providing server according to an embodiment of the present invention;

4 is an exemplary diagram of a database structure for managing package content in a package content providing server according to an embodiment of the present invention;

5 is an exemplary diagram of a database structure for managing content purchase history information in a package content providing server according to an embodiment of the present invention;

6 is a data format for package content delivered to a terminal from a package content providing server according to an embodiment of the present invention;

7 is a schematic block diagram of a terminal for processing package contents according to an embodiment of the present invention;

8A and 8B are exemplary diagrams of a database structure for managing content information stored in a package content processing terminal according to an embodiment of the present invention;

9A and 9B are exemplary diagrams of a database structure for managing usage rights information stored in a terminal for processing package contents according to an embodiment of the present invention;

10 is a flowchart illustrating a process for providing package content in a package content providing server according to an embodiment of the present invention;

11 is a flowchart illustrating a process for executing package content in a package content processing terminal according to an embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for providing contents based on D.M. (DRM), and more particularly, to a method and apparatus for providing DRM based package contents.

Recently, due to the development of computer and communication technology, the digital contents industry using them is prevalent.

"Digital content" refers to all intangible information distributed on-line, such as e-books or multimedia (eg, images, music, video, games, etc.). Such digital content is composed of a program or data file driven by a specific device (eg, a computer device, etc.), thereby facilitating duplication and distribution by the Internet or other data storage devices (eg, CD, floppy disk, etc.).

As a result, each digital content producer is working in various ways to prevent this.

A representative method for preventing illegal copying and distribution of digital contents is a user authentication method using DRM (DRM) technology.

The user authentication method using the DRM technology provides a digital content together with a right object (RO) when the digital content is provided and checks whether the corresponding right is valid when the digital content is executed. Authenticate the user. For example, when the method provides specific digital content (hereinafter, referred to as 'first digital content'), the method provides a first digital content encrypted with a right to decrypt the first digital content. When the execution of the first digital content is requested, it is first checked whether there is a use right corresponding to the first digital content, and if the use right is present, the first digital content is decoded and executed using the use right. .

Therefore, in the case of digital content using DRM technology, even if the content is illegally copied and distributed, its execution is restricted, thereby protecting digital content.

Such DRM technology generally grants one usage right per digital content. Therefore, in the case of granting a right to use one or more digital contents provided by a specific site as a package, such as a 'music album', the number of uses equal to the number of digital contents included in the package despite the purchase unit being one. Must be authorized.

Therefore, unnecessary load is generated on the package content providing server. In addition, the user terminal should store the use rights for each of the one or more digital contents included in the package contents. Therefore, when a plurality of digital contents are included in the package contents, the memory usage efficiency of the user terminal is deteriorated.

Accordingly, an aspect of the present invention is to provide an apparatus and method for more conveniently using the package contents in providing DRM-based package contents.

In addition, the present invention is to provide an apparatus and method for unifying usage rights for one or more contents included in package contents into one.

DRM-based package content providing method provided by the present invention to achieve the above object is a first process of detecting the one or more individual content in response to a purchase request of the package content including one or more individual content, and the detected A second process of generating one package use right for each individual content to be used in common, a third process of encrypting each of the individual content, and generating content transmission information including the encrypted individual content and the package use right And a fourth process of decrypting the requested individual content using the package permission in response to the execution request of one of the individual contents included in the package content, and executing the decrypted individual content. It characterized in that it comprises a sixth process.

In this case, the package usage right preferably includes key information commonly used to decrypt one or more encrypted individual contents included in corresponding package contents, and a usable period of the package contents.

In addition, the fifth process may further include checking whether the individual content is included in the package content in response to a request for executing the individual content.

Meanwhile, in order to achieve the above object, a DRM-based package content providing server provided by the present invention includes a content management database unit for storing package information to be provided by the server and information on one or more individual contents included in the package content; A control unit for detecting one or more individual contents included in the package content from the content management database unit in response to a request for purchasing a package content, and a license for generating one package use right commonly used by the individual contents detected by the control unit; And a content delivery information generation unit for generating content delivery information including the one right to use the package after encrypting the individual contents detected by the control unit.

In addition, the DRM-based package content processing terminal provided by the present invention in order to achieve the above object communication interface for receiving content transmission information for the package content including one or more encrypted individual content from the DRM-based package content providing server And a content storage unit to detect and store the encrypted individual contents from the content transmission information, and to detect and store a package use right that will be commonly used to decrypt the encrypted individual contents from the content transmission information. And a DRM agent for decrypting the individual content requested for execution using the package permission in response to the execution request of one or more individual contents included in the package content. .

In this case, the content storage unit preferably includes a package content management database including a package content identification number, an identification number of each of one or more individual contents included in the corresponding package content, and encrypted content information.

In addition, the DRM agent searches the contents of the content storage unit in response to a request for executing individual contents of the user to check whether the requested individual contents are included in the package contents, and then uses the package permission when included in the package contents. It is desirable to decrypt the individual content.

In addition, the usage right storage unit preferably includes a usage rights management database including a package content identification number and one key information commonly used to decrypt one or more contents included in the corresponding package contents.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this case, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

1 is a schematic configuration diagram of a system for providing content based on DRM. Referring to FIG. 1, the DRM-based content providing system includes user terminal devices (eg, the personal computer 110 and the mobile terminal 120) that can be connected to the communication network 130, various contents, and the user's request. The content server 150 providing the content, and the content server 150 encrypts the content provided to the terminal devices 110 and 120 and generates a right object (RO) for the encrypted content. It includes a DRM server 140.

At this time, the DRM server 140 preferably encrypts the content by an encryption method based on the Open Mobile Alliance (OMA) 2.0. Cryptography based on OMA 2.0 is one of the world's standards for content encryption and can be easily understood by those of ordinary skill in the field of encryption. Therefore, in the present specification, a detailed description of the encryption method based on OMA 2.0 will be omitted.

On the other hand, the content server 150 provides package contents in which one or more digital contents provided by a specific site are packaged together, and for this purpose, it is preferable to store the package contents information together. In addition, the DRM server 140 and the content server 150 may be collectively referred to as a DRM-based content providing server.

Therefore, hereinafter, the content server 150 storing the DRM server 140 and the information for providing the package content together will be collectively referred to as a DRM-based package content providing server.

2 is a schematic block diagram of a DRM-based package content providing server according to an embodiment of the present invention. Referring to Figure 2 DRM-based package content providing server 200 according to an embodiment of the present invention is a content management database (Data Base, referred to as "DB") 210, the content purchase history information management DB ( 220, a communication interface (hereinafter referred to as “I / F”) unit 230, a controller 240, a usage right generator 250, and a content transmission information generator 260.

The content management DB 210 includes an individual content management DB 211 storing individual content information and a package content management DB 213 storing package content information. In this case, the 'individual content' refers to the normal digital content, that is, one digital content, and the 'package content' refers to the bundle of one or more digital contents, that is, the bundle of the 'individual content'.

The individual content management DB 211 stores information on each of the contents identified by the content identification number (ID), and the package management DB 213 preferably stores the individual content list included in the package content. . 3 and 4 illustrate a DB structure for managing each of the individual contents and the package contents. Therefore, an example of a DB structure for managing each of the individual content and the package content will be described with reference to FIGS. 3 and 4.

The content purchase history information management DB 220 stores content purchase history information (eg, a purchase log) for each user. 5 illustrates a DB structure for managing the content purchase history information. Therefore, an example of a DB structure for managing the content purchase history information will be described with reference to FIG. 5.

The communication I / F unit 230 provides an interface with user terminal devices through a communication network. For example, the user receives a package content purchase request from a user terminal device (not shown) and delivers it to the control unit 240, and receives the package content generated in response to the request from the control unit 240. To pass).

The control unit 240 detects the corresponding content information by searching the individual content management DB 211 and the package content management DB 213 based on the user's request information input through the communication I / F unit 230, The usage right generation unit 250 and the content transmission information generation unit 260 are controlled to generate digital content transmission information corresponding to the request. For example, when the user requests the package content, the controller 240 searches the package content management DB 213 to detect the package content requested by the user, and refers to the individual content list included in the package content to manage the individual content management DB. It is preferable to detect individual contents included in the individual content list from 211.

The usage right generator 250 generates a usage right for the digital content requested by the user under the control of the controller 240. For example, when the user requests 'individual content', the permission generation unit 250 generates a usage right corresponding to the individual content (hereinafter, referred to as 'individual usage rights'), and the user selects 'package content'. If requested, the usage right generation unit 250 generates usage rights (hereinafter referred to as "package usage rights") representing one or more individual contents included in the 'package contents'. The result is transmitted to the content transmission information generation unit 260.

The content transmission information generation unit 260 receives the digital content search result requested by the user through the control unit 240, and receives the usage rights corresponding to the digital content from the usage rights generation unit 250 and receives 'content transmission information'. Create That is, it generates 'content transmission information' to be delivered to the user terminal device. For example, when a user requests 'individual content', the content transmission information generation unit 260 encrypts the individual content and receives the usage right corresponding to the individual content from the usage right generation unit 250. Generates content delivery information including individual content and its usage rights. If the user requests the 'package content', the content transmission information generation unit 260 performs a digital content search result requested by the user through the control unit 240 (eg, 'package content' and one or more 'individual content' included therein). Received), and receives the package permission from the usage rights generation unit 250. After encrypting one or more individual contents included in the package contents, content transmission information including the encrypted information and a right to use a package is generated. An example of the configuration of the content delivery information for the package content generated as described above is illustrated in FIG. 6. Therefore, a configuration example of the content delivery information for the package content will be described with reference to FIG. 6.

Meanwhile, the content delivery information generation unit 260 transmits the content delivery information generated as described above to the user terminal device that requested the content through the control unit 240 and the communication I / F unit 230.

3 is an exemplary diagram of a database structure for managing individual content in a package content providing server according to an embodiment of the present invention. 2 and 3, the individual content management DB 400 included in the DRM-based package content providing server 200 according to an embodiment of the present invention may have a content_identification number (410) / content_. It includes the Name 420 / Rating 430 / Cost 440 / File 450 fields.

The rating field 430 stores rating information for limiting a user of the corresponding content. For example, if you want to limit the age of use of the content to 19 years of age or older, the value '19' is stored in the grade field 430, and if you want to limit the history of use to 15 years of age or older, the grade field 430 Save the value '15'.

The cost field 440 stores cost information paid in return for using the corresponding content. For example, in the cost field 440, it is preferable to store the cost information differentiated according to the use period and the number of times of use of the corresponding content.

The file field 450 stores a corresponding content file (eg, an executable file).

4 is an exemplary diagram of a database structure for managing package content in a package content providing server according to an exemplary embodiment. 2 and 4, the package content management DB 300 included in the DRM-based package content providing server 200 according to an embodiment of the present invention provides a package_content_identification number (ID) 310 /. The package_content_name 320 / content_list 330 field is included.

In the content list 330, identification numbers (IDs) 331, 332, and 333 of individual contents included in corresponding package contents are stored. At this time, the IDs of the individual contents stored in the content list 330 preferably correspond to the content ID 410 of the individual content management DB 400 illustrated in FIG. 3.

5 is an exemplary diagram of a database structure for managing content purchase history information in a package content providing server according to an exemplary embodiment of the present invention. In this case, the content purchase history information is preferably configured for each user. Referring to FIGS. 2 and 5, the content purchase history information management DB included in the DRM-based package content providing server 200 according to an embodiment of the present invention is provided. 500 includes a user_identification number (510) / content_identification number (ID) 520 / content_type 530 / availability period 540 / availability count 550.

The content identification number field 520 stores an identification number for content purchased by the corresponding user. If the user purchases individual content, the corresponding individual content identification number is stored in the content identification number field 520. If the user purchases the package content, the content identification number field 520 identifies the corresponding package content. The number is stored.

The content type field 530 stores the type of content purchased by the corresponding user. For example, information for identifying whether the content purchased by the user is individual content or package content is stored.

The usage period field 540 and the usage count field 550 store the usage period and the usage count of the purchased content.

6 is a data format for package content delivered to a terminal from a package content providing server according to an embodiment of the present invention. 6 illustrates an example in which 'n' individual contents are included in the package contents. 2 and 6, the data format 600 for the package content generated by the content transmission information generation unit 260 and delivered to the user terminal device through the communication I / F unit 230 is a package content ID 610. ) / Package Use Rights (620) / Content ID 1 (630) / Encrypted Content 1 (640) /... / Content ID n 670 / encrypted content n 680.

Such package content authenticates its use using the same single package permission for each of the one or more encrypted contents.

Meanwhile, in the data format 600 illustrated in FIG. 6, user terminal device identification information to which the data format is to be transmitted is omitted. That is, the data format 600 preferably further includes user terminal device identification information.

To this end, if a package content purchase request is input from a specific user terminal device through the communication I / F unit 230, the control unit 240 detects the corresponding user terminal device identification number based on the caller information included in the request message. It is preferable to provide the identification information to the content transmission information generation unit 260.

3 to 6 only illustrate one embodiment of each database and data format, and the structure of each database and data format is not limited by the contents illustrated in FIGS. 3 to 6. For example, the individual content management DB 400 illustrated in FIG. 3 may further include a description field storing a brief description of the corresponding content.

7 is a schematic block diagram of a terminal for processing package contents according to an embodiment of the present invention. Referring to FIG. 7, a package content processing terminal 700 according to an embodiment of the present invention may include a user interface (I / F) 710, a content storage unit 720, a content playback unit 730, and a usage right storage. A unit 740, a DRM agent 750, and a communication I / F 760.

User I / F 710 provides interfacing with a user. For example, the package content request command is received from the user and delivered to the DRM agent 750.

The communication I / F 760 provides for interfacing with a communication network. For example, the content delivery information in response to a user's request is received from the DRM-based package content providing server (200 of FIG. 2) according to an embodiment of the present invention and delivered to the DRM agent 750.

The content storage unit 720 stores the content information delivered from the content providing server. For example, when content delivery information is delivered from a DRM-based package content providing server (200 of FIG. 2) according to an embodiment of the present disclosure, the content storage unit 720 may encrypt the content delivery information. Stores content information.

To this end, the DRM agent 750 detects only the encrypted content information to be stored in the content storage unit 720 from the content transmission information received through the communication I / F 760 and delivers it to the content storage unit 720. Do. For example, when the content delivery information received through the communication I / F 760 is content delivery information for the package content, the DRM agent 750 detects a plurality of encrypted contents except the package permission and detects the content storage unit ( If the content delivery information is content delivery information for individual content, the DRM agent 750 detects one encrypted content except for the usage right information and transmits the encrypted content to the content storage unit 720.

A DB structure for storing the individual content information and the package content information in the content storage unit 720 is illustrated in FIGS. 8A and 8B. Therefore, an example of the DB structure for each of the individual content information and the package content information will be described with reference to FIGS. 8A and 8B.

The content execution unit 730 executes the content requested by the user under the control of the DRM agent 750. That is, the content execution unit 730 executes the content decrypted by the DRM agent 750.

The usage right storage unit 740 stores the usage right information delivered from the DRM-based package content providing server (200 of FIG. 2) according to an embodiment of the present invention. For example, when the content transmission information corresponding to the package content is delivered from the DRM-based package content providing server (200 of FIG. 2) according to an embodiment of the present invention, the permission storage unit 740 may use the package permission. Save it.

To this end, the DRM agent 750 preferably detects the usage right information from the content transmission information received through the communication I / F 760 and delivers the usage right information to the usage right storage unit 740. For example, if the content delivery information received through the communication I / F 760 is content delivery information for the package content, the DRM agent 750 detects the package use right and transmits it to the use right storage 740. A DB structure for storing the usage right information in the usage right storage unit 740 is illustrated in FIGS. 9A and 9B. Therefore, an example of the DB structure stored in the permission storage unit 740 for each of the individual content information and the package content information will be described with reference to FIGS. 9A and 9B.

The DRM agent 750 performs various processes for executing DRM-based digital content. For example, when a user requests execution of one piece of content, the DRM agent 750 first determines whether the requested content is included in the package content purchased as a package. As a result, if the requested content is included in the package content, the requested content is decrypted using the package permission stored in the permission storage unit 740. Otherwise, the individual permission stored in the permission storage unit 740 is decoded. To decrypt the requested content.

As described above, the present invention uses only one package use right for package contents purchased as a package, but only one package use right may be stored in the corresponding terminal even though a plurality of digital contents are included in the package content. Therefore, the memory usage efficiency of the terminal can be improved.

8A and 8B are exemplary diagrams of a database structure for managing content information stored in a package content processing terminal according to an embodiment of the present invention. 8A shows an example of the content information storage DB 720a structure for individual content, and FIG. 8B shows an example of the content information storage DB 720b structure for package content.

Referring to FIG. 8A, the content information storage DB 720a for individual content includes a content_ID 721a / encrypted_content 723a field.

The content_ID field 721a stores information for identification of the corresponding content. This information is necessary to use as connection information with separately stored permission information.

Referring to FIG. 8B, the content information storage DB 720b for the package contents may include the package_content_ID 721b / content_ID_1 722b / encrypted_content_1 723b /... / Contents_ID_n (724b) / Encrypted_Contents_n (725b) fields.

The contents_ID fields 722b and 724b store an identification number for identifying each of the individual contents included in the corresponding package contents.

The package content ID is information necessary to be used as connection information with the separately stored package use right information.

9A and 9B are exemplary diagrams of a database structure for managing usage right information stored in a package content processing terminal according to an embodiment of the present invention. FIG. 9A shows an example of a structure of a usage right information management DB 740a for individual contents, and FIG. 9B shows an example of a structure of a package usage right management DB 740b for package contents.

Referring to FIG. 9A, the usage right information management DB 740a for individual content includes a content_id 741a / content_key 742a / available period 743a / available count 744a fields.

The content_key 742a stores information (eg, an authentication key, etc.) for decrypting the corresponding encrypted content.

Referring to FIG. 9B, the package permission information management DB 740b for package contents includes a package_content_ID 741b / content_key 742b / available period 743b fields.

The content_key field 742b stores information for decrypting one or more contents included in the package content.

In addition, the package permission information management DB 740b may further include the available number field (not shown).

10 is a flowchart illustrating a process for providing package content in a package content providing server according to an embodiment of the present invention. Referring to FIG. 10, a package content providing server (hereinafter referred to as a server) according to an embodiment of the present invention operates as follows.

First, when a package content purchase is requested from a user terminal device through a communication network (S105), the server detects previously stored package content information based on a package content identification number included in the request, and from the package content information, the package content information. Check the list of individual content included in (S110). At this time, the package content information preferably has a structure as illustrated in FIG. 4.

In step S110, the server that checks the individual content list included in the package content requested by the user detects the individual content included in the list (S115). For example, the respective content management DB is searched using the content ID included in the content list to detect corresponding individual contents. At this time, the individual content management DB preferably has a structure as illustrated in FIG.

After detecting the individual contents, the server generates a package use right to be commonly used by the detected individual contents (S120), and then encrypts all the detected individual contents (S125).

In addition, the content transmission information including the encrypted individual contents and the authority to use the package generated in the process S120 is generated (S130), and the content transmission information is transmitted to the corresponding user terminal device. The content transmission information generated at this time preferably has a structure as illustrated in FIG.

11 is a flowchart illustrating a processing procedure for executing package content in a terminal for processing package contents according to an embodiment of the present invention. Referring to FIG. 11, a package content processing terminal (hereinafter referred to as a “terminal”) according to an embodiment of the present invention operates as follows.

First, when the terminal user requests execution of one of the pre-stored contents (S205), the terminal checks whether the requested execution content is included in the package contents (S210). To this end, the terminal checks the package list included in the package content from the package content information stored in the content information storage unit, and checks whether the requested content is included in the package list.

As a result of the checking (S210), if the requested content is included in the package content, the package use right is detected from the use right information stored in the terminal (S215), otherwise, the individual content use right is obtained from the use right information stored in the terminal. It is detected (S220).

After determining whether the detected available period is valid (S225), if the available period is valid, the user decrypts the content requested for execution by using the detected usage right (S235) and executes the content. (S240).

On the other hand, if the available period is not valid, the determination result (S225) the terminal further performs a step (S230) for updating the corresponding usage rights. To this end, it is preferable that the terminal pays for the use of the package contents by connecting to the corresponding package contents seller.

In the above description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be defined by the described embodiments, but should be determined by the equivalent of claims and claims.

The DRM-based package contents providing method and apparatus of the present invention as described above use only one package use right for package contents purchased as a package. You only need to store the package permissions for. Therefore, the memory usage efficiency of the terminal can be improved. In addition, the package content providing server does not need to grant the same number of usage rights as the number of digital contents included in the package, thereby reducing the load on the package content providing server due to the use rights.

Claims (10)

In the DRM-based package content providing method, A first process of detecting the one or more individual contents in response to a purchase request of the package content including one or more individual contents; A second process of generating one package use right that the detected individual contents will use in common; Encrypting each of the individual contents; And a fourth process of generating content transmission information including the encrypted individual contents and a right to use a package. The method of claim 1, wherein the package permission is Key information commonly used to decrypt one or more encrypted individual contents included in corresponding package content, DRM-based package content providing method comprising the usable period of the package content. The method of claim 1, A fifth process of decrypting the individual requested content by using the package permission in response to the execution request of one of the individual contents included in the package content; And a sixth process of executing the decrypted individual contents. The method of claim 3, wherein the fifth process And checking whether the individual content is included in the package content in response to a request for executing the individual content of the user. In the DRM-based package content providing server, A content management database unit for storing information about package contents to be provided by the server and one or more individual contents included in the package contents; A control unit for detecting one or more individual contents included in the package contents from the contents management database unit in response to a package contents purchase request; A usage right generation unit for generating one package use right commonly used by the individual contents detected by the control unit; And a content delivery information generation unit for generating content delivery information including the one package usage right after encrypting the individual contents detected by the control unit. The method of claim 5, wherein the package use rights are Key information commonly used to decrypt one or more encrypted individual contents included in corresponding package content, DRM-based package content providing server, characterized in that it comprises a usable period of the package content. In the terminal for DRM-based package content processing, A communication interface unit receiving content transmission information on package content including one or more encrypted individual contents from a DRM-based package content providing server; A content storage unit for detecting and storing the encrypted individual contents from the content transmission information; A usage right storage unit for detecting and storing one package use right which will be commonly used to decrypt the encrypted individual contents from the content transmission information; DRM based package content processing, characterized in that it comprises a DRM agent for decrypting the individual content requested to execute using the package permission in response to the execution request of one or more of the individual content included in the package content Terminal. The method of claim 7, wherein the content storage unit DRM-based package content processing terminal, characterized in that it comprises a package content management database containing a package content identification number, identification number and encrypted content information of each of one or more individual contents included in the corresponding package content; . The method of claim 8, wherein the DRM agent is In response to a request for executing individual contents, the contents storage unit is searched to determine whether the requested individual contents are included in the package contents, and when the contents are included in the package contents, the individual contents are used using the package permission. DRM-based package content processing terminal characterized in that the decoding. The method of claim 7, wherein the usage rights storage unit A DRM-based package contents processing terminal, comprising: a rights management database including a package contents identification number and one key information commonly used to decrypt one or more contents included in corresponding package contents; .

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