KR100823677B1 - DDR system and method for multimedia contents attached to multimedia messages - Google Patents

Abstract

The present invention relates to a DRM system and method for protecting copyright of multimedia contents attached to a multimedia message, and the DRM system encrypts original multimedia contents attached to a multimedia message from a multimedia message center and stores the contents in a content DB. A DRM packager for transmitting the encrypted content to the multimedia message center when registering to the multimedia message center, an encryption key and key distribution for registering DRM content information and content metadata from the DRM packager and interpreting the encrypted content. And a DRM server for issuing usage rights for the content to the user, storing the information according to the usage rights, and a DRM agent for downloading the encrypted content and usage rights from the terminal and controlling content playback. include In addition, the content can be protected through encryption, and various usage rights can be created, thus ensuring copyright protection and promoting the distribution of content through various prices.

MMS, DRM, Packager, Encryption, Agent, Encryption Key, Permissions

Description

DRM system and method for multimedia contents attached to multimedia messages and a method thereof {DRM system and method for multimedia contents added in multimedia message}

1 is a configuration diagram for explaining the operation of the conventional MMS system.

2 is an overall configuration diagram of a DRM system configuration for protecting copyright of multimedia content attached in an MMS according to the present invention.

3 is a configuration diagram of an MMS DRM server in the DRM system of the present invention.

4 is a configuration diagram of an MMS DRM packager in the DRM system of the present invention.

5 is a configuration diagram of an MMS DRM agent in the DRM system of the present invention.

6 is a flowchart of a DRM method for multimedia content according to the present invention.

`` Explanation of symbols for main parts of drawings ''

10, 11: user terminal

20: MMSC (MMS Center) 21, 22, 23: content provider

24: additional service provider (VASP) 25: MMS server

26 storage 27 transcoder

28: MMS relay 29: Certification Service Department

30: billing processing unit

100, 101: DRM agent 112: decryption module

200: DRM packager 201: DRM packager

202: DRM content DB 300: DRM server

301: Authority issuance unit 302: License DB

303: KEY Information DB

The present invention relates to a DRM system and method for protecting copyright of multimedia content attached to a multimedia message, and more particularly, to encrypt multimedia content attached to an MMS, and to issue a use right to use the encrypted content. The present invention relates to a DRM system and method for protecting copyright of multimedia content by delivering to a user.

MMS (Multimedia Messaging Service) is a mobile service that can be transmitted by attaching digital photos, digital videos, digital sound sources, etc., while being able to transmit 1000 characters, which is developed from the conventional SMS capable of transmitting 80 characters.

DRM (Digital Rights Management) system is a technology that protects the rights and interests of content providers, prevents illegal copying, supports the creation and distribution management of contents, such as charging royalties and payment agents.

This includes digital rights management technology that ensures that only legitimate users use the content and pay the appropriate fees, software and security technology for copyright approval and enforcement, and payment and payment technology.

1 is a block diagram illustrating a processing procedure in a conventional MMS system.

Referring to FIG. 1, user A wants to send a text message and multimedia content with attachment from terminal A 10 to terminal B 11 of user B. FIG.

The transmitted multimedia content may be provided from the content providers 21, 22, and 23, and may use the multimedia content stored in the terminal A 10.

When the user A selects the multimedia content to be attached and the additional service provider 24 is added, the MMSC (MMS Center) 20 requests MMS transmission from the terminal A 10 to the terminal B 11. Receive and start sending MMS.

The MMSC 20 registers the attached multimedia contents in the MMS server 25 and stores them in the storage 26.

Then, the transcoder 27 converts the multimedia content to suit the device performance (screen size, audio / video playback, etc.) of the terminal B 11.

Subsequently, the authentication processing unit 29 of the MMSC 20 performs authentication processing 29 between the user A and the user B, and when the charging processing unit 30 completes the charging process for the use of multimedia content or additional service and MMS transmission, The multimedia content message is transmitted to the terminal B 11 of the user B through the MMS relay 28.

However, in the conventional MMS system, since the original content is attached as it is without encrypting the attached multimedia content, there is a problem of unauthorized theft, hacking, and copyright infringement of the content.

The present invention has been proposed to solve the above problems, the DRM system for protecting the copyright of the multimedia content by encrypting the multimedia content to distribute the content, and to be issued a use right to use the content; It is to provide a method.

The DRM system for the multimedia content according to the present invention for achieving the above object, when the original multimedia content attached to the multimedia message from the multimedia message center is encrypted and stored in the content DB and attached to the multimedia message A DRM packager for transmitting encrypted content to the multimedia message center, registering DRM content information and content metadata from the DRM packager, storing encryption key and key distribution information for interpreting the encrypted content; It includes a DRM server for issuing a usage right for the content to the user, and stores the information according to the usage right, and a DRM agent for downloading the encrypted content and the usage right from the terminal to control the playback of the content.

In addition, in the DRM system for multimedia content according to the present invention, the content attached to the multimedia message is characterized in that the content stored in the user terminal or content provided by the content provider.

In addition, in the DRM system for multi-media content according to the present invention, the DRM server, when a request for issuing the use rights for the encrypted content comes in to process the metadata necessary to issue the use rights to generate a use right And issuing an authorization issuing unit, and a license DB and key information DB for storing the information and the encryption key for the use right.

In addition, in the DRM system for multi-media content according to the present invention, a copyright server or a HTTP server that accesses a copyright management request or a permission issue request by accessing a copyright holder or a user, and a permission manager after verifying authentication of the copyright holder. Copyright management module that performs copyright management such as copyright deletion, suspension, resumption, retrieval, and statistical information by accessing license DB, key information DB, and DRM contents that collect and process information about the contents encrypted in the metadata. Management module, billing system interworking module that processes billing information for issuance of authorization by processing information related to payment, PKI that performs user authentication on issuance of authorization by issuing certificate for public key based on PKI encryption technology Determine policies for modules, rules of use, and use rules When handling the usage rule management module, and completing the verification of the metadata it will be characterized by further comprising a transmitting module for transmitting the generated permission from the permission issuing unit to the user.

In addition, in the DRM system for the multimedia content according to the present invention, the DRM packager, the HTTP server to which a message requesting the registration of the content to be encrypted from the multimedia message center, the content registrant is a content author, registrant, GUI for encrypting desired content by directly inputting metadata such as content type and content, DRM packager for encrypting content, encryption key in preparation for request for transmission of encryption key for encrypted content It is characterized in that it comprises a PKI interworking module, a content DB for storing encrypted content through the content manager, and a transmission module for transmitting the original content to the DRM packager and processing the PKI interworking module.

In addition, in the DRM system for the multi-media content according to the present invention, if the use of the encrypted content is requested, the content access module for confirming the information of the content, request for issuance of permission to use the DRM server, and receives it A transfer module, a license repository that stores permissions through the transfer module, a permission management module that checks the permissions stored in the license repository through the repository manager, and a decryption module that interprets the encrypted content using encryption keys. And a temporary storage for temporarily storing the analyzed content and deleting the content when the use request is terminated, and a GUI for allowing a user to access the DRM agent management module.

On the other hand, DRM method for the multimedia content according to the present invention, the user selects the content to be attached to the multimedia message, the user requesting the transmission of the multimedia message to the multimedia message center, the multimedia message center of the other party Converting the multimedia message to suit the performance of the terminal, encrypting the content attached to the converted multimedia message, notifying the DRM server of the encrypted content information and the encryption key, and encrypting the multimedia message center. Transmitting the requested multimedia message to a terminal of the counterpart, requesting a use right to a DRM server to use the received multimedia message, and transmitting the requested use right to the corresponding terminal.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention has a structure that can protect the copyright of the multimedia content attached to the MMS.

Figure 2 is a block diagram of the overall DRM system configuration for protecting the copyright of the multimedia content attached in the MMS according to the present invention.

The DRM agents 100 and 101 operate in common with the terminals 10 and 11 of the user A and the user B.

User A may deliver a multimedia message to user B through DRM agent 100, and user B may use the multimedia message received through DRM agent 101 as well.

Referring to FIG. 2, user A wants to attach and send a text message and multimedia content to terminal B of user B through DRM agent 100 of terminal A. FIG.

The multimedia content is provided from a content provider 21, 22, 23.

When the multimedia content to be attached to the message to be transmitted is selected, and the additional service provider 24 selects the additional service of the additional service provider 24 to be added, the MMSC (MMS Center) 20 determines the DRM agent 100 of the terminal A. Is requested to transmit the multimedia message to the terminal B, and the multimedia message transmission starts.

The MMSC 20 registers the attached multimedia contents in the MMS server 25 and stores them in the storage 26.

Then, the transcoder 27 converts the multimedia content to suit the device performance (screen size, audio / video playback, etc.) of the terminal B 11.

Then, the MMSC 20 encrypts the converted multimedia content through the DRM packager 200 and stores it in the content DB 201.

At the same time, the encryption key used for encryption and the information of the encrypted content are transmitted to the DRM server 300.

After this process, the authentication processing unit 29 of the MMSC 20 performs authentication processing between the user A and the user B, and when the charging processing unit 30, the charging process for the multimedia content use or additional service and MMS transmission, The MMS relay 28 transmits the multimedia message including the multimedia content to the terminal B 11 of the user B.

After receiving the multimedia message, the DRM agent 101 of the terminal B 11 requests a usage right from the DRM server 300 for playback.

The DRM server 300 delivers the usage rights including the received encryption key to the DRM agent 101 of the user B through the authority issuing unit 301, and transmits the key information and license information thereof. The key information DB 303 and the license information DB 302 are stored.

The DRM agent 101, which owns both encrypted content and usage rules, can now play multimedia messages.

3, 4, and 5 show detailed system configurations of the DRM server, the DRM packager, and the DRM agent, respectively.

3 is a detailed configuration diagram of the MMS DRM server in the DRM system according to the present invention.

The DRM server 300 processes the copyright management request of the copyright holder or a user authorized by the copyright holder, and issues a right of use for the encrypted content.

First, when a copyright management request comes in, the DRM server 300 accesses to the copyright management module 309 after the copyright holder or a user authorized by the copyright holder accesses the HTTP server 304 of the DRM server 300 through HTTP. can do.

 The copyright management module 309 accesses the license DB 302 and the key information DB 303 through the use authority manager 311 after confirming the certification of the copyright holder, and provides copyright deletion, suspension, resumption, search, and statistical information. You can do the same copyright management.

In addition, when there is a request for issuing a use right, the DRM server 300 includes an encryption key in the use right by the authority issuing unit 301 and delivers it to the requested place.

When the DRM server 300 receives a request for issuing a permission for the encrypted content, the DRM server 300 processes the metadata required for issuing the permission, generates and issues a permission in the authorization issuer 301, and generates the permission. The information about is stored in the license DB 302 and the key information DB 303 to support copyright management of an authorized copyright holder or a user authorized by the copyright holder.

The metadata are processed by collecting information on the encrypted content in the DRM content management module 307, the billing system interworking module 310 to process the billing for the issue of the use rights by processing the information related to the payment. In the PKI module 308, a certificate for a public key is issued based on a PKI encryption technology to provide functions such as user authentication, message authentication, and electronic signature related to the issue of a use right.

In addition, the usage rule management module 309 determines a policy for the usage rule and processes information about the usage rule.

When the verification of the metadata is completed, the authority issue unit 301 generates a usage right, and is transmitted to the user through the transmission module 305.

In this case, the process of transmitting the usage right to the user may be transmitted through HTTP or attached to a multimedia message through the MMS relay 28.

4 is a detailed configuration diagram of the MMS DRM packager in the DRM system according to the present invention.

The DRM packager 200 converts the original content to be encrypted and protected. The encryption key used at this time is transmitted to the DRM server 300 to be attached when generating a use right.

The DRM packager 200 transmits a message requesting registration of the content to be encrypted from the MMSC 20 to the HTTP server 204.

After authentication of the content registrant, through the graphical user interface (GUI) 206 such as selecting a menu on the web page, the registrant can proceed to encrypt the content desired by the registrant.

In addition, the GUI 206 may directly input metadata such as content author, registrant, content type, content, and the like.

Thereafter, the original content may be delivered to the DRM packager 201 through the transmission module 205, and the PKI may be processed through the PKI interworking module 207.

When the above process is completed, the package is encrypted using the DRM packager 201.

The encrypted content is stored in the content DB 202 through the content manager 203, and notifies the registrant of the registration result.

Thereafter, if there is a request for transmission of an encryption key for the encrypted content from the authorization issuing unit 301 of the DRM server 300, the corresponding encryption key is transmitted through the transmission module.

When the content management request is delivered, the user may access the content DB 202 and manage the content using the management function provided from the content manager 203 through the GUI 206.

5 is a detailed configuration diagram of the DRM agent in the DRM system according to the present invention.

The DRM agent (100, 101) is responsible for the management (transfer, delete, backup, recovery) of the encrypted content, control the use of the content according to the usage rules specified in the usage rights, the application inside the terminal to use the actual content Responsible for interfaces with

The DRM agents 100 and 101 allow encrypted content to be used in applications of the user's terminal 11.

When the use of the encrypted content is requested in a specific application such as a viewer or a player, the DRM agents 100 and 101 check the information of the corresponding content through the content access module 111.

In addition, through the permission management module 113 through the repository manager 118 to check the valid permissions stored in the permission repository (118).

If the permission is not present or the permission has expired, a purchase request message for the new permission is sent to the user through the application.

If there is a user's approval, a request for issuing a usage right is sent to the authority issuing unit 301 of the DRM server 300 through the transmission module 114.

Thereafter, the permission is transmitted through the transmission module 114, and the permission is stored in the permission repository 118.

At this time, if there is a valid use right, the use rule and the encryption key is extracted through the use right management module 113.

The encrypted content may be interpreted through the decryption module 112 using the encryption key, and the interpreted content is stored in the temporary storage 119.

The DRM agent management module 115 processes the content use request of the application through the content stored in the temporary storage 119 and the extracted use rule.

The user can access the DRM agent management module 115 through the GUI 116, and the transmission of the encrypted content and the use right is made through the transmission module 114.

6 is a flowchart of a DRM method for multimedia content according to the present invention.

Referring to FIG. 6, a user first selects content to attach to a multimedia message. In this case, the attached content may be stored in the user terminal or provided from a content provider (S61).

  Next, the user requests the transmission of the multimedia message to the multimedia message center (S62). In this case, the selected content will be attached to the multimedia message.

Next, the multimedia message center proceeds with the step of converting the multimedia message to suit the capabilities of the other party (S63).

In operation S64, the content attached to the converted multimedia message is encrypted in a DRM package.

At this time, the information and the encryption key of the encrypted content is notified to the DRM server (S65).

Thereafter, the multimedia message encrypted through the multimedia message center is transmitted to the terminal of the other party through the mobile communication network (S66).

The receiving terminal requests the use right to the DRM server to use the received multimedia message (S67), and when the requested use right is transmitted to the corresponding receiving terminal, the receiving terminal decodes the encrypted content and follows the usage rule. It can be used (S68).

As described above, according to the present invention, it is possible to protect the content through encryption of the multimedia content attached to the multimedia message and to create various usage rights through the usage rules specified in the usage rights. Copyright protection is guaranteed, and users can be provided with the right to use contents through various prices instead of the uniform price selection, thereby enhancing the activation of content distribution.

Claims (7)

A DRM packager for encrypting the original multimedia content attached to the multimedia message from the multimedia message center, storing the original multimedia content in a content DB, and transmitting the encrypted content to the multimedia message center when attaching the multimedia message to the multimedia message; Register DRM content information and content metadata from the DRM packager, store encryption key and key distribution information for interpreting the encrypted content, issue a right to use the content to the user, A DRM server storing information according to the information; And And a DRM agent that downloads the encrypted content and a usage right from a terminal and controls content playback. The DRM server includes: An authority issuing unit for generating and issuing a usage right by processing metadata required for issuing a right when a request for issuing a right for encrypted content is received; A license DB and key information DB for storing information on the usage right and an encryption key; An HTTP server to which a copyright holder or a user connects through HTTP to receive a copyright management request or a permission issue request; A copyright management module for performing copyright management such as copyright deletion, suspension, resumption, retrieval, and statistical information by accessing a license DB and a key information DB through an authorization manager after verifying the certification of the copyright holder; A DRM content management module for collecting and processing information about the content encrypted in the metadata; A billing system interworking module that processes billing information for issuing a use right by processing information related to payment; A PKI module for performing user authentication on issuing permission by issuing a certificate for a public key based on PKI encryption technology; A usage rule management module for determining a policy on a usage rule to form various usage rights, and processing information on the usage rule; And DRM system for the multimedia content attached to the multimedia message, characterized in that it comprises a transmission module for transmitting to the user the usage rights generated by the authorization issuer when the verification of the metadata is completed. The method of claim 1, The content attached to the multimedia message is a content stored in a user terminal or a content provided by a content provider, DRM system for multimedia content attached to the multimedia message, characterized in that provided. delete delete The method of claim 1, The DRM packager unit, An HTTP server to which a message for requesting registration of content desired to be encrypted is transmitted from the multimedia message center; A GUI that allows a content registrant to directly input metadata such as content author, registrant, content type, content, and the like to encrypt a desired content; A DRM packager for packaging the content; A PKI interworking module for an encryption key in preparation for an encryption key transmission request for the encrypted content; A content DB for storing encrypted content through a content manager; And DRM system for delivering multimedia content to the DRM package, and the DRM system for multimedia content comprising a transmission module for processing by the PKI interworking module. The method of claim 1, The DRM agent, A content access module for verifying information of the content, when the use of the encrypted content is requested; A transmission module requesting for issuance of a use right to the DRM server and receiving the same; A permission repository for storing permission through the transmission module; A permission management module for checking a permission stored in a permission repository through a repository manager; Decryption module for interpreting the encrypted content using the encryption key; A temporary storage for temporarily storing the analyzed content and deleting the content when the use request is terminated; And And a user interface (GUI) for accessing the DRM agent management module. delete

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