KR100693483B1 - D.R.M-based term subscription content providing method and apparatus therefor - Google Patents

Abstract

The present invention relates to an apparatus and method for providing a term-based subscription content based on DRM. The present invention relates to a management of a user whose content providing server is previously stored in response to a request message of a user terminal that wants to subscribe to a term subscription service for using a term subscription content. A first step of updating a DB; A second step of generating a master usage right to guarantee the use of all contents provided by the content providing server during the term subscription service period and providing the same to the user terminal; A third step of searching for the user management DB in response to the user's request to use the content to determine whether the user has subscribed to the term subscription service; A fourth step of determining whether the service period of the user has expired when the user subscribes to the term subscription service; And a fifth process of updating the master usage right if the service period of the user has expired. Accordingly, the present invention enables the user to see the effect of extending the usage period for all the contents included in the term subscription content by updating only the master authority when the term subscription period expires. As a result, users can more conveniently use the term subscription content.

DRM, term subscription, content, permissions

Description

D. R.M-based term subscription content providing method and apparatus therefor {METHOD AND APPARATUS FOR PROVIDING FIXED CHARGE CONTENTS USING D.R.M}

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

2 is a flowchart illustrating a method of providing a D.M.M-based term subscription content according to an embodiment of the present invention;

3 is a schematic block diagram of a D.M.M-based period flat rate content providing server according to an embodiment of the present invention;

4 is an exemplary diagram of a database structure for managing content in the server;

5 is an exemplary diagram of a D.M.M-based database structure for managing a user in the server,

6 is a schematic block diagram of a terminal for processing period flat content according to an embodiment of the present invention;

7 is an exemplary diagram of a database structure for managing a subscription content information received from a server by the terminal;

8 is an exemplary diagram of a database structure for managing the master permission information received from the server by the terminal.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a device for providing content based on D.M. (DRM), and more particularly, to a method and a device for providing a DRM based period flat rate content.

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 copying and dissemination 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 grants digital content together with a right object (RO) when providing digital content and checks whether the corresponding permission 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 usage rights for one or more digital contents provided by a specific site, such as 'period of flat contents' for a certain period, the same number of usage rights as the number of digital contents should be granted.

This results in a large amount of usage rights if the user wants to use a subscription for the 'all' digital content provided by a particular site. In addition, if you wish to extend the term, you must change all of the above entitlements. That is, when the term of the term subscription content has expired, it is determined whether or not the validity of the corresponding usage rights is valid when the first execution request is made after the term of the term subscription content expires for each of the digital contents included in the term subscription content. The process of changing authority should be performed.

Therefore, if the term of the term subscription content has expired, the term subscription content providing server may experience a load due to a change in the usage rights of each of the digital contents included in the term subscription content, and the term subscription content user may expire the term subscription content. You must take the hassle of having to perform the permission change request according to the corresponding digital contents.

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

In another aspect, the present invention is to provide an apparatus and method for efficiently changing the usage rights according to the expiration of the period subscription content.

In addition, the present invention is to provide an apparatus and method for integrated management of the use rights of the digital content included in the DRM-based term subscription content.

In order to achieve the above object, the method of providing DRM-based termed content in the present invention is a DRM-based termed content providing method, wherein a request message of a user terminal to subscribe to a termed subscription service for using termed termed content is provided. In response to the content providing server updating a previously stored management DB of the user, and generating a master usage right to guarantee the use of all contents provided by the content providing server during the term subscription service period. A second process provided to the terminal, a third process of searching for the user management DB in response to the user's request to use the content, and determining whether the corresponding user has subscribed to the term subscription service, and the user providing the term subscription service If you signed up for that user's service period A fourth process of determining whether or not the service has expired, a fifth process of updating the master use authority if the service period of the user has expired, content requested to be used in response to the content use request of the user, and a corresponding individual A sixth process of encrypting usage rights, a seventh process of delivering the encrypted content and individual use rights to a user terminal, an eighth process of decrypting the encrypted individual use rights using pre-stored master use rights; And a ninth process of decrypting the encrypted content using the decrypted individual usage rights.

At this time, in the first process, it is preferable to write whether the period subscription service is used and the period information in the additional service subscription information field included in the user management DB.

In addition, the master usage rights preferably include key information for decrypting individual usage rights for each of the one or more general contents included in the term subscription content, and the period of usable period of the term subscription content.

In order to achieve the above object, the DRM-based term-based content providing server of the present invention includes a content management database unit that stores information on contents to be provided by the server, and a user who receives content through the server. A user management database for storing information about the master, and in response to the subscription request information of the user who wants to subscribe to the term subscription service, generate a master permission to guarantee the use of all contents provided by the server for a certain period of time; A permission authority generation unit for checking whether the service period has expired in response to content request information of a user who has subscribed to a subscription service, and updating the master permission if the service period has expired, and the created or updated master permission For delivering to the user terminal It characterized in that it comprises an interface unit.

In this case, the user management database unit includes an additional service subscription information field of a corresponding user, and the additional service subscription information field is a field for storing whether a corresponding user has subscribed to a subscription service, and storing the service period. It is preferred to include a field for the.

In addition, the master usage rights preferably include key information for decrypting individual usage rights for all contents that can be provided during the subscription service period, and the subscription service period.

In order to achieve the above object, the terminal for processing the DRM-based termed content in accordance with the present invention receives a master usage right from a server that provides the DRM-based termed content in response to a user's subscription request. A master permission storage for storing, a content information storage for receiving encrypted contents and encrypted individual usage rights from the server in response to a content usage request of the user, and a response to the content usage request of the user; And a DRM agent for authenticating whether or not the requested content is executable using the master usage right.

At this time, the DRM agent decrypts the encrypted individual use rights of the content requested to use using the master use right, and decrypts the encrypted content using the decrypted individual use rights.

In addition, the usage right storage unit preferably stores the key information for decrypting the information for decrypting the encrypted individual usage rights included in the subscription content, and the master usage rights including the available period of the subscription content.

Also, the content storage unit preferably includes a content identification number field, an encrypted individual usage right field for the corresponding content, and an encrypted general content field.

On the other hand, the method for providing the DRM-based term subscription content by using the terminal in response to the user's request to join the term subscription service received the master usage rights from the server that provides the DRM-based term subscription content is stored A master permission storage step, a content information storage step of receiving and storing encrypted content and an encrypted individual usage right from the server in response to the content use request of the user, and the encrypted using the master permission And a first decryption step of decrypting the individual use rights, and a second decryption step of decrypting the encrypted content using the decrypted individual use rights.

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 is provided with a period subscription content for freely using a plurality of contents for a predetermined period, it is preferable to store the period subscription content information for this purpose. 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 that stores the DRM server 140 and information for providing the period flat content will be collectively referred to as a DRM-based term flat content providing server.

2 is a flowchart illustrating a method of providing a DRM-based termed flat rate content according to an embodiment of the present invention. 2 is a DRM-based term content content providing server (hereinafter, referred to as a "server") 200 according to an embodiment of the present invention, and a terminal for processing term-based content content based on DRM according to an embodiment of the present invention ( Hereinafter, a procedure performed between the terminals 300 is referred to as 'terminal'.

Referring to FIG. 2, a method of providing DRM-based termed content according to an embodiment of the present invention is as follows.

First, after the terminal 300 accesses the server 200 and transmits a subscription request message to a service for using a term subscription content (hereinafter, referred to as a term term subscription service) (S105), the server 200 is stored in advance. The user management DB of the user terminal 300 is updated (S110). For example, the additional service subscription information included in the user management DB is changed. That is, the content (for example, flag display) and the service period indicating that the user uses the term subscription service is entered in the additional service subscription information field included in the user management DB.

In addition, the server 200 generates a master usage right that allows the user of the terminal 300 to use all contents provided by the server 200 during the period of the service subscription period (S115), and then executes the master usage right. 300 to be delivered (S120). At this time, the process (S120) is preferably performed with the result notification for the request (S105).

The terminal 300 receiving the master usage right stores the master usage right in an internal memory (S125).

In addition, the terminal 300 transmits a content use request message based on the user's selection information to the server 200 (S130). At this time, the terminal 300 preferably transmits the identification number (CID: Contents ID) of the content to be requested and the terminal number of the corresponding terminal 300.

The server 200 receiving the content use request searches for a user management DB managed by the server 200 by using the terminal number of the corresponding terminal 300 delivered together with the request (S135). That is, the user management DB is searched to determine whether the user has subscribed to the term subscription service.

If it is determined that the user has subscribed to the subscription service period, the server 200 determines whether the service period of the user has expired based on the information stored in the user management DB (S140). If the service period has expired, the master usage rights provided to the terminal 300 is updated (S145). At this time, in the above process, it is desirable to determine the extension period by the user's approval of the terminal 300 and update the master use authority based on the period information.

In addition, the updated master use authority is transmitted to the terminal 300 (S150).

The server 200 detects the requested content from the pre-stored content management DB, generates individual use rights corresponding thereto, and encrypts the content and individual use rights (S165). In addition, the encrypted content and individual usage rights are transmitted to the terminal 300 (S170).

On the other hand, the terminal 300 requesting the use of the content and waiting for the content to be delivered in step S130 receives the updated master use right from the server 200 (S155) and changes the stored master use right. (S160). When the encrypted content and the individual use right are transmitted from the server 200 (S170), the execution process of the corresponding content is performed using the master use right. That is, after decrypting the transferred individual usage rights using the master usage rights stored in the terminal 300 (S175), the corresponding content is decrypted using the individual usage rights (S180). Then, the content is executed (not shown).

As described above, the present invention grants a 'master use right' to a terminal of a user who has subscribed to the term subscription service and authenticates the user's use of the content during the corresponding term subscription service period using the master use right. That is, the encrypted individual use right is decrypted using the master use right, and the encrypted content is decrypted using the individual use right.

That is, when managing the expiration period of the term subscription content by using the master usage rights assigned to the term subscription content, the terminal 300 for processing the term subscription content daily for one or more general contents included in the term subscription content You do not need to update the permissions.

Figure 3 is a schematic block diagram of a D.M.M-based period content providing server according to an embodiment of the present invention. Referring to FIG. 3, the DRM-based term content providing server 200 according to an embodiment of the present invention may include a content management database 210, a user management DB 220. , A communication interface (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 manages information on all contents provided by the server 200. The content management DB 210 includes contents ID 211 / content name 212 / grade 213 / cost 214 / file 215 fields as illustrated in FIG. It is preferable to manage. In particular, the rating field 213 preferably stores rating information for limiting the 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, store the value '19' in the grade field 213, and if you want to limit the age of use to 15 years of age or older, Save the value '15'. The cost field 214 preferably stores rating information for limiting users of the corresponding content. For example, the cost field 214 stores cost information differentiated according to the usage period and the number of times of use of the corresponding content. The file field 215 also stores a corresponding content file (eg, an executable file).

The user management DB 220 manages information on users who have a history of purchasing all contents provided by the server 200. The user management DB 220 is a user management number 221 / terminal number 222 / name 223 / resident registration number 224 / contact 225 / additional service subscription information 226 as illustrated in FIG. It is preferable to include and to manage the user information (particularly, additional service subscription information). In particular, in the supplementary service subscription information field 226, a field 226a for inputting whether or not the user has subscribed to the term subscription service and a field 226b for inputting the service term if the user has subscribed to the term subscription service. ), And to store the corresponding information.

The communication I / F unit 230 provides an interface with user terminal devices through a communication network. For example, a user receives a request for a subscription to a term content from a user terminal device (not shown) and transmits it to the control unit 240, and receives a master use authority generated in response to the request from the control unit 240. (Not shown).

The controller 240 searches the content management DB 210 based on the user's request information input through the communication I / F unit 230, detects corresponding content information, and transmits the digital content corresponding to the request. The usage right generation unit 250 and the content transmission information generation unit 260 are controlled to generate information. For example, when a user who subscribes to a subscription service request for the use of specific content, the controller 240 searches the user management DB 220 and checks the service period of the corresponding user. That is, the service authority generation unit 250 is controlled to check whether the service period of the corresponding user has expired and to update the master usage right if the service period has expired. The content transmission information generator 260 is controlled to generate information for delivering the requested content to the user.

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 a user who subscribes to the subscription service requests the use of specific content, the usage right generation unit 250 generates individual usage rights for the specific content. In addition, the usage right generation unit 250 updates the corresponding master usage right when the service period of the user has expired. The result is then transmitted to the content delivery information generator 260.

The content transmission information generation unit 260 generates information for delivering the content requested by the user to the terminal under the control of the control unit 240. For example, 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. It is preferable to generate 'transmission information'. That is, the content delivery information generation unit 260 generates 'content delivery information' to be delivered to the user terminal device.

In particular, when a user who has subscribed to a subscription service for a period requests execution of specific content, 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 permission from the usage rights generation unit 250. Receive individual usage rights for the content. In addition, it is preferable to generate 'content transmission information' by encrypting the individual usage right and the corresponding digital content.

On the other hand, when the master use authority is transmitted from the use authority generation unit 250, the content transmission information generation unit 260 preferably generates information for transferring the master use authority to the user terminal.

6 is a schematic block diagram of a terminal for processing a period flat rate content according to an embodiment of the present invention. Referring to FIG. 6, the terminal 300 for processing a flat fee content according to an embodiment of the present invention may include a user interface (I / F) 310, a content storage unit 320, a content execution unit 330, and a usage right. Storage 340, DRM agent 350, and communication I / F 360.

User I / F 310 provides for interfacing with a user. For example, the user receives a content request command from a user who has subscribed to the subscription service and delivers it to the DRM agent 750.

Communication I / F 360 provides for interfacing with a communication network. For example, the content delivery information in response to the user's request is received from the DRM-based term content providing server ('200' of FIG. 2) according to an embodiment of the present invention and delivered to the DRM agent 350.

The content storage unit 320 stores the content information delivered from the content providing server. For example, when the content delivery information corresponding to the period flat content is delivered from the DRM-based period flat rate content providing server ('200' of FIG. 2) according to an embodiment of the present invention, the period flat rate content information corresponding thereto is provided. That is, encrypted individual usage rights and encrypted content).

To this end, the DRM agent 350 preferably detects only information to be stored in the content storage unit 320 from the content transmission information received through the communication I / F 360 and delivers the information to the content storage unit 320. For example, if the content delivery information received through the communication I / F 360 is the content delivery information for the term subscription content, the DRM agent 350 may include information except the master permission (that is, the encrypted individual permission and the encryption). The detected content) and transmits the detected content to the content storage unit 320. An example of the DB structure for storing the period flat content in the content storage unit 320 is illustrated in FIG. 7. Therefore, an example of the DB structure for storing the period flat content in the content storage unit 320 will be described with reference to FIG. 7.

The content execution unit 330 executes the content requested by the user under the control of the DRM agent 350. That is, the content execution unit 330 executes the content decrypted by the DRM agent 350.

The usage right storage unit 340 stores the usage right information transmitted from the DRM-based period content providing server ('200' of FIG. 2) according to an embodiment of the present invention. For example, when master usage rights are delivered from a DRM-based termed content subscription server ('200' in FIG. 2) according to an embodiment of the present invention, the master authority information is stored and individual usage rights for specific content are stored. When this is delivered, the individual permission information is stored. An example of a DB structure for storing usage right information in the usage right storage unit 340 is illustrated in FIG. 8. Therefore, an example of a DB structure for storing the usage right information in the usage right storage unit 340 will be described with reference to FIG. 8.

The DRM agent 350 performs various processes for executing DRM-based digital content. For example, when a user who subscribes to a subscription service requests for execution of specific content, the DRM agent 350 forwards the request message to a server ('200' of FIG. 2), and when the content information is transmitted from the server, After storing in the content storage unit 320, the usage right information (for example, master usage rights) is detected from the usage right storage unit 340 to decode the content information. The content execution unit 330 controls the content execution unit 330 to execute the corresponding content using the decryption result.

7 is an exemplary diagram of a DB structure for managing the period content information received by the terminal from the server. Referring to FIG. 7, the content information management DB 720a includes a content_ID 721a / encrypted_use permission 722a / encrypted_content 723a fields. As such, the term subscription content is stored together with the encrypted usage right in the content storage unit.

8 is an exemplary diagram of a DB structure for managing the master permission information received from the server. Referring to FIG. 8, the master usage right information management DB 340a includes a connection key 341a / availability period 341b field.

The connection key field 341a stores information for decrypting an encrypted usage right (ie, an individual usage right) included in the term subscription content information. For example, information for decrypting the information stored in the encrypted permission permission field 722a of FIG. 7 is stored.

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.

As described above, the method and apparatus for providing a DRM-based termed subscription content according to the present invention allocate a master use right to a user who subscribes to a term subscription service, and use the master use right to individually allocate all contents to the term subscription content. By managing the usage rights, it is possible to efficiently change the usage rights when the term subscription contents expire. That is, the user can see the effect of extending the usage period for all the contents included in the subscription content by renewing only the master authority when the subscription period expires. As a result, users can more conveniently use the term subscription content.

Claims (12)

In the method of providing the DRM-based subscription content in the content providing server, A first process of updating a management DB of a pre-stored user in response to a request message of a user terminal intending to subscribe to a term subscription service for use of a term subscription content; A second process of generating a master usage right that guarantees the use of all contents provided by a content providing server and providing the user terminal to the user terminal during the term subscription service period; A third step of determining whether the corresponding user subscribes to the subscription service by searching the user management DB in response to the request for using the content; A fourth step of determining whether the service period of the user has expired when the user subscribes to the term subscription service; And a fifth step of updating the master usage right when the service period of the user has expired. The method of claim 1, A sixth process of encrypting the requested content and corresponding individual usage rights in response to the user's request to use the content; A seventh process of transmitting the encrypted content and individual usage rights to a user terminal; An eighth process of decrypting the encrypted individual usage rights using previously stored master usage rights; And a ninth process of decrypting the encrypted content by using the decrypted individual usage rights. The method of claim 1 or 2, wherein the first process is performed. DRM-based term subscription content providing method, characterized in that whether to use the period subscription service and the period information in the additional service subscription information field included in the user management DB. The method of claim 1 or 2, wherein the master permission is Key information for decrypting individual usage rights for each of the one or more general contents included in the term subscription content, Method for providing the DRM-based flatbed content, characterized in that it comprises the available period of the subscription. In the DRM-based subscription content providing server, A content management database unit for storing information on contents to be provided by the server; A user management database unit which stores information on users who are provided with content through the server; In response to the subscription request information of the user who wants to subscribe to the period subscription service, create a master usage right that guarantees the use of all contents provided by the server for a certain period of time, A response authority generation unit for checking whether the service period has expired in response and updating the master usage right when the service period has expired; And a communication interface unit for transmitting the generated or updated master usage authority to a user terminal. The method of claim 5, wherein the user management database unit A corresponding service additional information subscription field of the corresponding user; The additional service subscription information field is A field for storing whether the user has subscribed to the subscription service, And a field for storing the service period. The method of claim 5, wherein the master permission is Key information for decrypting individual usage rights for all contents that can be provided during the subscription period; DRM-based period content providing server, characterized in that it comprises a period service period. In the DRM-based terminal content processing terminal, A master permission storage unit for receiving and storing master permission from a server providing DRM-based term subscription contents in response to a subscription request of a user who wants to subscribe to a term subscription service; A content information storage unit receiving and storing encrypted content and encrypted individual usage rights from the server in response to a content use request of the user; And a DRM agent for authenticating whether or not the requested content is executable by using the master usage authority in response to the user's request for using the content. The method of claim 8, wherein the DRM agent is And decrypting the encrypted individual usage rights of the content requested to be used using the master usage rights, and decrypting the encrypted content using the decrypted individual usage rights. The method of claim 8, wherein the usage rights storage unit Key information for decrypting the information for decrypting the encrypted individual usage rights included in the term subscription content, and DRM-based term subscription content, characterized in that for storing the master use rights including the available period of the term subscription content Processing terminal. The method of claim 8, wherein the content storage unit A content identification number field, Encrypted individual permissions fields for the corresponding content, Terminal for processing the DRM-based period flat content, characterized in that it comprises an encrypted general content field. In the method of providing a DRM-based period flat rate content using a mobile communication terminal, A master permission storage step of receiving and storing master permission from a server providing DRM-based term subscription content in response to a subscription request of a user who wants to subscribe to a term subscription service; A content information storage step of receiving and storing encrypted content and encrypted individual usage rights from the server in response to the user's request for using the content; A first decryption step of decrypting the encrypted individual usage rights using the master usage rights; And a second decryption step of decrypting the encrypted content by using the decrypted individual usage rights.

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