CN101621664A - Method and system for managing digital rights - Google Patents
Method and system for managing digital rights Download PDFInfo
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- CN101621664A CN101621664A CN200910089944A CN200910089944A CN101621664A CN 101621664 A CN101621664 A CN 101621664A CN 200910089944 A CN200910089944 A CN 200910089944A CN 200910089944 A CN200910089944 A CN 200910089944A CN 101621664 A CN101621664 A CN 101621664A
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Abstract
The invention discloses a method and a system for managing digital rights. The method comprises the following steps: a digital content is pre-treated and the pre-treated information is sent to a subscriber certificate server or a key management module; an authorization control message is generated and sent to a pre-treating device according to the pre-treated information; the authorization control message is added to the digital content and sent to a terminal top-set box by the pre-treating device; a user requests the digital content from a business operation support system or a subscribe management system, and the business operation support system or the subscribe management system generates and sends an authorization message to a license server; the terminal top-set box acquires the authorization message from the license server, analyzes the digital content added with the authorization message and uses the digital content. The technical scheme of the invention can be compatible with the prior one-way or two-way digital television services without influencing the conditional access system widely used at present, and guarantee the use security of downloading or sending the content.
Description
Technical field
The present invention relates to the digital television techniques field, relate in particular to a kind of digital copyright management method and system.
Background technology
Content is downloaded and the off-line use is a kind of form of service that digital television business is actively promoted, and its key technology is how the use of downloading content is effectively managed.
Be loaded under the content in the unidirectional and bi-directional digital television business and have imbody,, show as content in the one-way digital television business and download and Push VOD business as in the bi-directional digital television business, showing as content download services.
Push VOD is a kind of VOD business that is applicable to the one-way digital television network, different with other VOD video on-demand systems is, Push VOD is the digital TV network system that utilizes tradition unidirectional, to treat that the program request digital content is pushed to terminal set top box, and will treat that by terminal set top box the program request digital content is saved in the memory devices such as local hard drive, the user can carry out demand (telecommunication) service on terminal.Push VOD has solved and can't realize the user under the unilateral network environment not under the situation by other order request information return networks, the online problem of enjoying order program service constantly.
All all are to carry out subsequent applications after the content download with content by the professional essence that pushes in advance, program request downloads to the terminal equipment preservation, all there is certain security risk in these schemes, cause easily and treat that on-demand content is replicated, illegally uses and illegal distribution.
Summary of the invention
The objective of the invention is to propose a kind of digital copyright management method and system, do not influence present widely used condition receiving system, realized compatiblely to have unidirectional and bi-directional digital television business now, and ensured the safety of downloading or pushing the content use.
For reaching this purpose, the present invention by the following technical solutions:
A kind of digital copyright management method is applicable to that the service condition receiving system carries out the digital television service system of service authorization, may further comprise the steps:
A, digital content is carried out preliminary treatment, and pretreatment information is sent to the subscriber's certificate server or the key management module of condition receiving system;
B, subscriber's certificate server or key management module generate Entitlement Control Message according to pretreatment information, and send to pretreatment unit;
C, pretreatment unit join Entitlement Control Message in the digital content, and the digital content that will add Entitlement Control Message sends to terminal set top box;
D, user are to business operation support system or subscriber management system program request digital content, and business operation support system or subscriber management system generate authorization message, and send to permit server;
E, terminal set top box obtain authorization message from permit server, the digital content that has added Entitlement Control Message is resolved, and use digital content.
Described digital content is carried out preliminary treatment is that digital content is carried out pre-scrambling, and described pretreatment information is the scrambling control word, and described pretreatment unit is a scrambler.
Described digital content is carried out preliminary treatment is that digital content is encrypted in advance, and described pretreatment information is an encryption key, and described pretreatment unit is an encryption equipment.
Described authorization message comprises user ID, digital content ID, authorization key and licensing term parameter.
Step D is further comprising the steps of:
Permit server sends the authorization key request of reading to subscriber's certificate server or key management module;
Subscriber's certificate server or key management module are exported to permit server with authorization key;
Permit server is inserted into authorization key in the authorization message.
Perhaps, step D is further comprising the steps of:
Permit server reads authorization key request and authorization message to subscriber's certificate server or key management module transmission;
Subscriber's certificate server or key management module are inserted authorization message with authorization key;
Subscriber's certificate server or key management module send to permit server with authorization message.
When digital television business was the unilateral network environment, step e further may further comprise the steps:
Permit server sends to condition receiving system with authorization message;
Condition receiving system generates Entitlement Management Message according to authorization message, and sends to terminal set top box;
Terminal set top box is resolved the Entitlement Management Message that receives, and obtains scrambling control word or encryption key;
Terminal set top box carries out descrambling or deciphering to digital content, and uses digital content.
Further comprising the steps of:
When generating, adopt described Entitlement Management Message the key of user smart card to encrypt encapsulation;
Terminal set top box adopts described user smart card that the Entitlement Management Message that receives is decrypted.
When digital television business was the unilateral network environment, step e further may further comprise the steps:
Permit server generates licence according to authorization message, and licence is sent to the data broadcasting manager;
The data broadcasting manager is broadcast to terminal set top box with licence;
Terminal set top box is resolved licence, obtains authorization message;
Terminal set top box obtains scrambling control word or encryption key according to authorization message;
Terminal set top box carries out descrambling or deciphering to digital content, and uses digital content.
Further comprising the steps of:
When generating, adopt by described licence the key of user smart card to encrypt encapsulation;
Terminal set top box adopts described user smart card that the licence that receives is decrypted.
When digital television business was bidirectional network environment, step e further may further comprise the steps:
Permit server generates licence according to authorization message, and returns to terminal set top box based on bilateral network;
The digital copyright management client of terminal set top box is resolved licence, obtains authorization message;
Terminal set top box obtains scrambling control word or encryption key according to authorization message;
Terminal set top box carries out descrambling or deciphering to digital content, and uses digital content.
Further comprising the steps of:
When generating, adopt by described licence the key of user smart card to encrypt encapsulation;
Terminal set top box adopts described user smart card that the licence that receives is decrypted.
Further comprising the steps of: that digital watermarking is injected into digital content.
A kind of system for numeral copyright management, be applicable to that the service condition receiving system carries out the digital television service system of service authorization, comprise digital content pretreatment module, digital content distribution module and digital content use control module, described digital content pretreatment module further comprises scrambler or encryption equipment, is used for digital content is carried out pre-scrambling or pre-the encryption; The digital content distribution module is used for distribute digital content and gives terminal set top box, and is used to produce authorization message and is distributed to terminal set top box; Digital content uses control module to be positioned at terminal set top box, is used to resolve authorization message and digital content is carried out descrambling or deciphering.
Digital content uses control module further to comprise user smart card, is used for decrypt authorized information.
When digital television business was bidirectional network environment, digital content used control module further to comprise the digital copyright management client, is used to resolve licence.
Adopted technical scheme of the present invention, do not influenced under the present widely used condition receiving system prerequisite, realized compatiblely to have the one-way digital television business now, and ensured download or push the safety that content is used; Support is injected and extraction based on the copyright information of digital watermark technology, on existing DRM product basis, expanded the digital watermarking function, existing audio/video flowing water seal injection module is added in preprocessing part to content, this watermark module is based on digital watermark technologies such as cosine transforms, realized the hidden injection of copyright information, have the high robust characteristics, the also supporting independently watermark verifying function module that provides of system has been established technical foundation with this to more in depth supporting " infringement discovery system " in the future; STB built-in DRM Client software, the main permission of being responsible for Push VOD receives, permission is resolved and contents decryption, has realized the input and output control to STB simultaneously.
Description of drawings
Fig. 1 is the structural representation of system for numeral copyright management in the specific embodiment of the invention one.
Fig. 2 is the flow chart of digital copyright management in the specific embodiment of the invention one.
Fig. 3 is the structural representation of system for numeral copyright management in the specific embodiment of the invention two.
Fig. 4 is the flow chart of digital copyright management in the specific embodiment of the invention two.
Fig. 5 is the structural representation of system for numeral copyright management in the specific embodiment of the invention three.
Fig. 6 is the flow chart of digital copyright management in the specific embodiment of the invention three.
Embodiment
Further specify technical scheme of the present invention below in conjunction with accompanying drawing and by embodiment.
The main thought of technical solution of the present invention is to be applicable to that the service condition receiving system carries out that the digital television service system of service authorization is divided into digital content pretreatment module, digital content distribution module and digital content is used control module, the digital content pretreatment module further comprises scrambler or encryption equipment, and digital content is carried out pre-scrambling or pre-the encryption; Digital content distribution module distribute digital content is given terminal set top box, and is used to produce authorization message and is distributed to terminal set top box; Digital content uses control module to be positioned at terminal set top box, resolves authorization message and digital content is carried out descrambling or deciphering.
Fig. 1 is the structural representation of system for numeral copyright management in the specific embodiment of the invention one.As shown in Figure 1, this system for numeral copyright management is applicable to that digital television business is the situation of unilateral network environment, it comprises watermark injection module 101, encryption equipment 102, condition receiving system 103, permit server 106, subscriber management system 107, terminal set top box 105, wherein condition receiving system also comprises subscriber's certificate server 104, and terminal set top box also comprises user smart card 108.
Fig. 2 is the flow chart of digital copyright management in the specific embodiment of the invention one.As shown in Figure 2, the flow process of this digital copyright management may further comprise the steps:
Step 201, digital watermarking is injected into digital content, this watermark has realized the hidden injection of copyright information based on digital watermark technologies such as cosine transforms, has the high robust characteristics.
Step 202, digital content is carried out preliminary treatment, promptly adopt scrambler or encryption equipment that digital content is carried out pre-scrambling or pre-the encryption.
Step 203, with pretreatment information, scrambling control word just or encryption key send to the subscriber's certificate server or the key management module of condition receiving system.
Step 204, subscriber's certificate server or key management module generate Entitlement Control Message (ECM) according to pretreatment information and send to pretreatment unit, just scrambler or encryption equipment.
Step 205, pretreatment unit join Entitlement Control Message in the digital content, and the digital content that will add Entitlement Control Message sends to terminal set top box.
Step 206, user are to business operation support system or subscriber management system program request digital content, and business operation support system or subscriber management system generate authorization message, and send to permit server.This authorization message comprises parameters such as user ID, digital content ID and licensing term parameter.
Step 207, permit server send the authorization key request of reading to subscriber's certificate server or key management module, subscriber's certificate server or key management module are exported to permit server with authorization key, and permit server is inserted into authorization key in the authorization message.
For higher fail safe, this step can also adopt following scheme:
Permit server reads authorization key request and authorization message to subscriber's certificate server or key management module transmission, subscriber's certificate server or key management module are inserted authorization message with authorization key, and subscriber's certificate server or key management module send to permit server with authorization message.Permit server just can't directly touch authorization key like this.
Step 208, permit server send to condition receiving system with authorization message, and condition receiving system generates Entitlement Management Message (EMM) according to authorization message, and sends to terminal set top box.
Step 209, terminal set top box are resolved the Entitlement Management Message that receives, and obtain scrambling control word or encryption key, and terminal set top box carries out descrambling or deciphering to digital content again, and use digital content.
In the above-mentioned steps, the password that based target smart card that the user holds (Smart Card) was corresponding when Entitlement Management Message generated, adopt cryptographic algorithm Entitlement Management Message to be encrypted encapsulation based on this password, both had only correct smart card just can decipher this Entitlement Management Message, and then used built-in authorization message.
Fig. 3 is the structural representation of system for numeral copyright management in the specific embodiment of the invention two.As shown in Figure 3, this system for numeral copyright management is applicable to that digital television business is the situation of unilateral network environment, it comprises watermark injection module 301, encryption equipment 302, condition receiving system 303, permit server 306, subscriber management system 307, terminal set top box 305, wherein condition receiving system also comprises subscriber's certificate server 304 and data broadcasting manager 309, and terminal set top box also comprises user smart card 308.
Fig. 4 is the flow chart of digital copyright management in the specific embodiment of the invention two.As shown in Figure 4, this digital copyright management flow process may further comprise the steps:
For higher fail safe, this step can also adopt following scheme:
Permit server reads authorization key request and authorization message to subscriber's certificate server or key management module transmission, subscriber's certificate server or key management module are inserted authorization message with authorization key, and subscriber's certificate server or key management module send to permit server with authorization message.Permit server just can't directly touch authorization key like this.
In the above-mentioned steps, the password that based target smart card that the user holds (Smart Card) was corresponding when licence generated, adopt cryptographic algorithm licence to be encrypted encapsulation, both had only correct smart card just can decipher this licence, and then used built-in authorization message based on this password.
Fig. 5 is the structural representation of system for numeral copyright management in the specific embodiment of the invention three.As shown in Figure 5, this system for numeral copyright management is applicable to that digital television business is the situation of bidirectional network environment, it comprises watermark injection module 501, scrambler 502, condition receiving system 503, permit server 506, business operation support system 507, terminal set top box 505, wherein condition receiving system also comprises key management module 504, and terminal set top box also comprises user smart card 508 and digital copyright management client 509.
Fig. 6 is the flow chart of digital copyright management in the specific embodiment of the invention three.As shown in Figure 6, this digital copyright management flow process may further comprise the steps:
For higher fail safe, this step can also adopt following scheme:
Permit server reads authorization key request and authorization message to subscriber's certificate server or key management module transmission, subscriber's certificate server or key management module are inserted authorization message with authorization key, and subscriber's certificate server or key management module send to permit server with authorization message.Permit server just can't directly touch authorization key like this.
In the above-mentioned steps, the password that based target smart card that the user holds (Smart Card) was corresponding when licence generated, adopt cryptographic algorithm licence to be encrypted encapsulation, both had only correct smart card just can decipher this licence, and then used built-in authorization message based on this password.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with the people of this technology in the disclosed technical scope of the present invention; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (16)
1, a kind of digital copyright management method is applicable to that the service condition receiving system carries out the digital television service system of service authorization, it is characterized in that, may further comprise the steps:
A, digital content is carried out preliminary treatment, and pretreatment information is sent to the subscriber's certificate server or the key management module of condition receiving system;
B, subscriber's certificate server or key management module generate Entitlement Control Message according to pretreatment information, and send to pretreatment unit;
C, pretreatment unit join Entitlement Control Message in the digital content, and the digital content that will add Entitlement Control Message sends to terminal set top box;
D, user are to business operation support system or subscriber management system program request digital content, and business operation support system or subscriber management system generate authorization message, and send to permit server;
E, terminal set top box obtain authorization message from permit server, and the digital content that has added Entitlement Control Message is resolved, and use digital content.
2, a kind of digital copyright management method according to claim 1 is characterized in that, described digital content is carried out preliminary treatment is that digital content is carried out pre-scrambling, and described pretreatment information is the scrambling control word, and described pretreatment unit is a scrambler.
3, a kind of digital copyright management method according to claim 1 is characterized in that, described digital content is carried out preliminary treatment is that digital content is encrypted in advance, and described pretreatment information is an encryption key, and described pretreatment unit is an encryption equipment.
4, a kind of digital copyright management method according to claim 1 is characterized in that, described authorization message comprises user ID, digital content ID and licensing term parameter.
5, a kind of digital copyright management method according to claim 1 is characterized in that step D is further comprising the steps of:
Permit server sends the authorization key request of reading to subscriber's certificate server or key management module;
Subscriber's certificate server or key management module are exported to permit server with authorization key;
Permit server is inserted into authorization key in the authorization message.
6, a kind of digital copyright management method according to claim 1 is characterized in that step D is further comprising the steps of:
Permit server reads authorization key request and authorization message to subscriber's certificate server or key management module transmission;
Subscriber's certificate server or key management module are inserted authorization message with authorization key;
Subscriber's certificate server or key management module send to permit server with authorization message.
7, according to claim 5 or 6 described a kind of digital copyright management methods, it is characterized in that when digital television business was the unilateral network environment, step e further may further comprise the steps:
Permit server sends to condition receiving system with authorization message;
Condition receiving system generates Entitlement Management Message according to authorization message, and sends to terminal set top box;
Terminal set top box is resolved the Entitlement Management Message that receives, and obtains scrambling control word or encryption key;
Terminal set top box carries out descrambling or deciphering to digital content, and uses digital content.
8, according to claim 5 or 6 described a kind of digital copyright management methods, it is characterized in that when digital television business was the unilateral network environment, step e further may further comprise the steps:
Permit server generates licence according to authorization message, and licence is sent to the data broadcasting manager;
The data broadcasting manager is broadcast to terminal set top box with licence;
Terminal set top box is resolved licence, obtains authorization message;
Terminal set top box obtains scrambling control word or encryption key according to authorization message;
Terminal set top box carries out descrambling or deciphering to digital content, and uses digital content.
9, according to claim 5 or 6 described a kind of digital copyright management methods, it is characterized in that when digital television business was bidirectional network environment, step e further may further comprise the steps:
Permit server generates licence according to authorization message, and returns to terminal set top box based on bilateral network;
The digital copyright management client of terminal set top box is resolved licence, obtains authorization message;
Terminal set top box obtains scrambling control word or encryption key according to authorization message;
Terminal set top box carries out descrambling or deciphering to digital content, and uses digital content.
10, a kind of digital copyright management method according to claim 7 is characterized in that, and is further comprising the steps of:
When generating, adopt described Entitlement Management Message the key of user smart card to encrypt encapsulation;
Terminal set top box adopts described user smart card that the Entitlement Management Message that receives is decrypted.
11, a kind of digital copyright management method according to claim 8 is characterized in that, and is further comprising the steps of:
When generating, adopt by described licence the key of user smart card to encrypt encapsulation;
Terminal set top box adopts described user smart card that the licence that receives is decrypted.
12, a kind of digital copyright management method according to claim 9 is characterized in that, and is further comprising the steps of:
When generating, adopt by described licence the key of user smart card to encrypt encapsulation;
Terminal set top box adopts described user smart card that the licence that receives is decrypted.
13, a kind of digital copyright management method according to claim 1 is characterized in that, and is further comprising the steps of: that digital watermarking is injected into digital content.
14, a kind of system for numeral copyright management, be applicable to that the service condition receiving system carries out the digital television service system of service authorization, it is characterized in that, comprise digital content pretreatment module, digital content distribution module and digital content use control module, described digital content pretreatment module further comprises scrambler or encryption equipment, is used for digital content is carried out pre-scrambling or pre-the encryption; The digital content distribution module is used for distribute digital content and gives terminal set top box, and is used to produce authorization message and is distributed to terminal set top box; Digital content uses control module to be positioned at terminal set top box, is used to resolve authorization message and digital content is carried out descrambling or deciphering.
15, a kind of system for numeral copyright management according to claim 14 is characterized in that, digital content uses control module further to comprise user smart card, is used for decrypt authorized information.
16, a kind of system for numeral copyright management according to claim 14 is characterized in that, when digital television business was bidirectional network environment, digital content used control module further to comprise the digital copyright management client, is used to resolve licence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910089944A CN101621664A (en) | 2009-07-28 | 2009-07-28 | Method and system for managing digital rights |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910089944A CN101621664A (en) | 2009-07-28 | 2009-07-28 | Method and system for managing digital rights |
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| CN101621664A true CN101621664A (en) | 2010-01-06 |
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| CN200910089944A Pending CN101621664A (en) | 2009-07-28 | 2009-07-28 | Method and system for managing digital rights |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102111404A (en) * | 2010-12-28 | 2011-06-29 | 四川长虹电器股份有限公司 | Method for communication between radio and TV business and operation support system and conditional access system |
| CN102761778A (en) * | 2012-07-30 | 2012-10-31 | 山东泰信电子股份有限公司 | Data encrypting and decrypting system and method based on bidirectional terminal |
| CN103929646A (en) * | 2014-04-29 | 2014-07-16 | 深圳国微技术有限公司 | Device and method used for insertion, detection and extraction of watermark |
| CN108134953A (en) * | 2016-11-30 | 2018-06-08 | 中国电信股份有限公司 | Set-top box identification and system |
-
2009
- 2009-07-28 CN CN200910089944A patent/CN101621664A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102111404A (en) * | 2010-12-28 | 2011-06-29 | 四川长虹电器股份有限公司 | Method for communication between radio and TV business and operation support system and conditional access system |
| CN102111404B (en) * | 2010-12-28 | 2013-04-03 | 四川长虹电器股份有限公司 | Method for communication between radio and TV business and operation support system and conditional access system |
| CN102761778A (en) * | 2012-07-30 | 2012-10-31 | 山东泰信电子股份有限公司 | Data encrypting and decrypting system and method based on bidirectional terminal |
| CN103929646A (en) * | 2014-04-29 | 2014-07-16 | 深圳国微技术有限公司 | Device and method used for insertion, detection and extraction of watermark |
| CN108134953A (en) * | 2016-11-30 | 2018-06-08 | 中国电信股份有限公司 | Set-top box identification and system |
| CN108134953B (en) * | 2016-11-30 | 2020-03-27 | 中国电信股份有限公司 | Set top box identification method and system |
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Open date: 20100106 |