CN101770794B - Digital copyright protection method and management device thereof for digital video disc system - Google Patents
Digital copyright protection method and management device thereof for digital video disc system Download PDFInfo
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- CN101770794B CN101770794B CN2008102466053A CN200810246605A CN101770794B CN 101770794 B CN101770794 B CN 101770794B CN 2008102466053 A CN2008102466053 A CN 2008102466053A CN 200810246605 A CN200810246605 A CN 200810246605A CN 101770794 B CN101770794 B CN 101770794B
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Abstract
A digital copyright protection method and a management device thereof for a digital video disc system relate to multimedia field. The management device is composed of an authorization management system, a replication business system and authorized playing equipment. The authorization management system is composed of a content protection authorization manager, a replication business authorization manager, a system safety data manager and a playing equipment authorization manager; the replication business system is composed of an authorization file manager, a making authorization manager and an encryption distribution manager; the playing equipment is composed of a playing authorization file manager, a legality authentication manager and a decryption playing manager. The invention adopts dual-key asymmetric encryption technique to build the digital copyright protection safety system for the digital video disc system, realizes the authorization management of the replication business system and meets the domestic tremendous HD content publishing and consumption demands; besides, the invention also has the advantages of safety, reliability and low operation cost.
Description
Technical field
The present invention relates to the multimedia field, especially towards the digital literary property protection method and the management devices thereof of digital versatile disk system.
Background technology
Along with the fast development of digitizing and optical storage technology, digital versatile disk system has been passed by the DVD epoch, and is the high definition epoch of representative along with the maturation of blue light optic disk technology is about to come into Blu-ray Disc (BD) and HD DVD.Yet the pirate phenomenon that always is accompanied by the continuous wildness of digital versatile disk system development is still perplexing content supplier and content operator.Avoid pirate for the digital content that makes legal publication and propagate and illegal the use, introducing digital copyright protection technology in digital versatile disk system is an important control device.
The digital copyright protection technology of digital versatile disk system belongs to the broadcasting cryptographic technique category that stateless is returned type, and the basic structure of its copyright protection system is as follows:
1) encrypt digital content: by content replication quotient system system digital content is carried out encryption, use a key to be locked.
2) secret key encryption: the key that will be used for encrypted digital content by content replication quotient system system carries out encryption, obtains key file.
3) packing is transmitted: encrypted digital content is stored on the CD media together with the key file packing, passes to the consumer by CD.
4) key obtains and decipher broadcast: playback equipment at first needs the key in the key file on the CD is decrypted in order to play encrypted digital content, obtains the decruption key of digital content, deciphers playing digital content again.
The basic structure of above-mentioned copyright protection system shows, the key problem of the digital copyright protection technology of digital versatile disk system is to solve the safe transfer of digital content and encryption key, effectively control and legal use problem.Owing to directly be not communicated with between numerous content replication quotient systems systems and the numerous playback equipments in the digital versatile disk system; authorized content and the protection authorized content key by medium with offline mode transmission and management; this typical stateless is returned the characteristics of the broadcasting cryptographic technique of type, makes the digital copyright protection technology of digital versatile disk system have more complicacy and challenge.
In the prior art; digital copyright protecting at BD and HD DVD a new generation optical disk system; united by big factories of information, household electrical appliances and Hollywood Pictures such as IBM, Intel, Microsoft, Panasonic, SONY, Toshiba, Disney and Warners and to have formulated copyright protection technology-AACS (Advanced Access Content System), its core technology is to adopt the binary tree structure of " NNLtree " by name to realize key management.
Yet the AACS technology faces three big realistic problems in the application of China:
(1) by the control of external producer, it is applied directly to China as safety technique to the technology that information security issue: AACS adopts fully, is the national information safety policy that does not meet China;
(2) cost issues: patent that the AACS technology relates to and system control fully in foreigner's hand, need expensive patent royalty and overhead cost licensing of China;
(3) management limitation problem: from the national conditions of China, the digital copyright technology of digital versatile disk system is realized the authorization control of playback equipment and the legal use of authorized content except needs, also need realize empowerment management to the replication business system with technological means, this does not have in the security system of AACS and relates to.
Summary of the invention
At above-mentioned problems of the prior art, the purpose of this invention is to provide a kind of digital literary property protection method and management devices thereof of digital versatile disk system.It adopts conbined public or double key asymmetric encryption techniques to be set up the security system of digital versatile disk system digital copyright protecting; realization is to the empowerment management of replication business system; high-definition content that China has a high potential is published and the demand of consumption to satisfy, the characteristics that the present invention has is safe and reliable, running cost is cheap.
In order to realize above-mentioned goal of the invention, technical scheme of the present invention realizes as follows:
A kind of digital literary property protection method of digital versatile disk system; it uses and comprises the authentication management system of being made up of content protecting Authorization Manager, replication business Authorization Manager, security of system data management system and playback equipment Authorization Manager; by replication business authority manager, make Authorization Manager and encrypt replication business system that release manager forms and put the playback equipment that manager is formed by play authorization file manager, legitimate verification manager reconciliation heavy seeding, its key step is:
1) system authorization:
1. the replication business Authorization Manager in the authentication management system is that the replication business authority manager of replication business system provides the replication business authority with the offline mode, comprises the private key of replication business system in the replication business authority and contains the replication business certificate of replication business system unique ID;
2. the playback equipment Authorization Manager offline mode in the authentication management system is for the play authorization file manager of playback equipment provides the device authorization file, comprise in the device authorization file playback equipment private key, playback equipment unique ID and with private key one by one corresponding PKI device certificate and with the system key packet of playback equipment binding;
2) programme content mandate and protection:
1. the making Authorization Manager of the replication business system programme content that copyright is legal generates the digital content characteristic, and submits the content protecting authorized application to authentication management system;
2. the content protecting Authorization Manager of authentication management system generates the content certificate of binding with programme content, comprises unique ID, digital content characteristic and the digital signature of programme content in the content certificate;
3. the security of system data management system of authentication management system generates the security of system packet that comprises relevant playback equipment, replication business system and programme content revocation information, and content certificate and security of system packet packing generation content production authority are issued the replication business system;
3) programme content adds DecryptDecryption:
1. the encryption release manager of replication business system is carried out encryption to programme content, produces program key and CD anti-copying identification data, and program key and CD anti-copying identification data are bound processing, obtains the encryption key of digital content; Use encryption key and symmetric encipherment algorithm that programme content is carried out symmetric cryptography and handle, obtain the programme content ciphertext; Use replication business system's private key and rivest, shamir, adelman that the program ciphertext is carried out asymmetric encryption and handle, generate the program key file;
2. the encryption release manager of replication business system writes the CD anti-copying identification data in the system data area that CD not directly copies, and programme content ciphertext, program key file, security of system packet, content certificate and the certificate packing of replication business system be recorded in the optical disc data district, be made into the program CD and externally issue;
3. the legitimate verification manager of playback equipment uses the legitimacy of the built-in device certificate verification system of security of system packet, content certificate, replication business certificate and playback equipment on the program CD;
4. the deciphering presentation manager of playback equipment is decrypted playback process to the programme content on the program CD: by resolving built-in system key packet and the replication business certificate on the CD, obtain the system key ciphertext of this CD correspondence; Use the playback equipment private key that said system key ciphertext is decrypted processing, obtain the system key of this CD correspondence; Use said system key and asymmetric arithmetic that the program key file on the program CD is carried out asymmetric decryption processing, obtain the program key of programme content; Program key and anti-copy sign are bound processing, obtain the decruption key of programme content; Use decruption key that the programme content ciphertext is decrypted processing, obtain the plaintext of programme content, carry out decodes and plays again.
In above-mentioned digital literary property protection method, the binding of described and playback equipment is meant that all system keys (PKI) in the system key packet are the ciphertexts after handling through the public key encryption of corresponding playback equipment.Described system key packet be meant data that all system keys form together with its corresponding replication business system banner ID to and the data acquisition of digital signature.
In above-mentioned digital literary property protection method, described security of system packet is meant the system data that is used for playback equipment deciphering legitimate verification, comprises illegal playback equipment, the bootlegging quotient system relevant revocation information of illegal contents of unifying.
In above-mentioned digital literary property protection method, the legitimacy of described verification system is meant that the revocation information in the using system secure data bag verifies accordingly, have only system's legitimacy to obtain confirming after, playback equipment just can be decrypted processing.
Realize the management devices of the digital literary property protection method of above-mentioned digital versatile disk system, its design feature is that it is by authentication management system, replication business system and authorize playback equipment to form.Authentication management system is made up of content protecting Authorization Manager, replication business Authorization Manager, security of system data management system and playback equipment Authorization Manager; The replication business system is made up of replication business authority manager, making Authorization Manager and encryption release manager; Playback equipment is conciliate heavy seeding by play authorization file manager, legitimate verification manager and is put manager and form.Authentication management system is with the empowerment management of offline mode control replication business system and playback equipment, the replication business system finishes encryption and the disc making and the issuing function of digital content, and playback equipment is finished the legitimate verification and the deciphering playback process function of digital content.
The present invention is owing to adopted above-mentioned method and device thereof; for digital versatile disk system provides a kind of based on the digital copyright protecting pattern of conbined public or double key to asymmetric encryption techniques; especially the current demand at China's digital copyright protecting provides a kind of reliable, digital copyright protection technology; thereby the digital copyright protection technology that helps digital versatile disk system is promoted widely in China, really realizes the safety propagation of digital content and the target of legal use.The present invention uses the encipherment protection of symmetric encipherment algorithm realization to digital content, and based on rivest, shamir, adelman, uses safeguard protection and the control of two groups of public private key pairs realizations to digital contents encryption key.Simultaneously; this system is introduced independently licensing scheme; realization is to the empowerment management of content replication business system and playback equipment system and effectively control; for setting up orderly digital content consumption market; realize the copyright protection and the safety management of digital content; not only provide the reliable technique assurance, and operation cost is cheap.
The invention will be further described below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is the principle assumption diagram of management devices of the present invention;
Fig. 2 is the system authorization processing flow chart of the inventive method;
Fig. 3 is the programme content mandate of the inventive method and adds the DecryptDecryption processing flow chart;
Fig. 4 adds DecryptDecryption signal transitive relation figure for the programme content of the inventive method.
Embodiment
Referring to Fig. 1, realize that the management devices of digital versatile disk system digital literary property protection method of the present invention is made up of authentication management system A, the B of replication business system and playback equipment C.Authentication management system A is made up of replication business Authorization Manager 1, playback equipment Authorization Manager 2, content protecting Authorization Manager 3 and security of system data management system 4, is responsible for finishing to functions such as replication business mandate, playback equipment mandate, content protecting mandate and system security managements.The B of replication business system by replication business authority manager 5, make Authorization Manager 6 and encrypt release manager 7 and forms, the encryption of responsible programme content 11, and be made into program CD 12 and be distributed to the consumer.Playback equipment C conciliates heavy seedings by play authorization file manager 8, legitimate verification manager 9 to be put manager 10 and forms, is responsible for finishing the function of the legal deciphering broadcast of program CD 12.Be loaded with the security of system data on the program CD 12 of the present invention, for the safety management that realizes total system provides important support.
Referring to Fig. 1 to Fig. 4, the step when the inventive method is used is:
1) system authorization:
1. the replication business Authorization Manager among the authentication management system A 1 is that replication business authority manager 5 among the B of replication business system provides replication business authority 13 with the offline mode, realizes the access permission to the B of replication business system.Replication business authority 13 is corresponding with the B of replication business system, includes private key and the replication business certificate of the B of replication business system, comprises the unique ID of the B of replication business system in the replication business certificate.
2. the playback equipment Authorization Manager among the authentication management system A 2 is that play authorization file manager 8 among the playback equipment C provides device authorization file 14 with the offline mode, realizes access permission and the deciphering control of playback equipment C are authorized.Device authorization file 14 is corresponding with playback equipment C, includes private key, device certificate and the system key packet of playback equipment C, comprises the unique ID of playback equipment C in the device certificate.Comprise the data is made up of all system keys and the corresponding replication business B of system thereof sign ID in the system key packet to constituting, the public key encryption of system key use playback equipment C is wherein bound with playback equipment C.
2) programme content mandate and protection:
1. the programme content 11 that copyright is legal of the making Authorization Manager 6 among the B of replication business system is issued the B of replication business system and is generated the digital content characteristic, and submits the content protecting authorized application to authentication management system A.
2. the content protecting Authorization Manager 3 of authentication management system A generates the content certificate of binding with programme content 11, includes unique ID, the digital content characteristic of programme content and the digital signature that is used for anti-tamper purpose.
3. pass through the security of system data management system 4 generation system secure data bags of authentication management system A, include the revocation information of relevant playback equipment, replication business system and programme content, and, submit to the B of replication business system with content certificate and security of system packet packing generation content production authority 15.
3) programme content adds DecryptDecryption:
1. encrypt 7 pairs of programme contents of release manager 11 by the B of replication business system and carry out encryption.At first, produce program key and CD anti-copying identification data at random, and program key and CD anti-copying identification data are bound processing, obtain the encryption key of digital content.Secondly, use encryption key and symmetric encipherment algorithm that programme content is carried out symmetric cryptography and handle, obtain the programme content ciphertext, then, use replication business system's private key and rivest, shamir, adelman that the program ciphertext is carried out asymmetric encryption and handle, generate the program key file.
2. the encryption release manager 7 of the B of replication business system writes the CD anti-copying identification data in the system data area that CD not directly copies, programme content ciphertext, program key file, security of system packet, content certificate and the certificate packing of replication business system are recorded in the optical disc data district, be made into the program CD, and externally issue.
3. pass through the legitimate verification manager 9 of playback equipment C, and use security of system packet, content certificate, replication business certificate and the built-in device certificate of playback equipment on the program CD 12, verification system legitimacy.
4. the programme content on 10 pairs of program CDs 12 of the deciphering presentation manager of playback equipment C is decrypted playback process.At first,, obtain the system key ciphertext of this CD correspondence, re-use the playback equipment private key said system key ciphertext is decrypted processing, obtain the system key of this CD correspondence by resolving built-in system key packet and the replication business certificate on the CD.Secondly, use said system key and asymmetric arithmetic that the program key file on the program CD 12 is carried out asymmetric decryption processing, obtain the program key of programme content 11.Then, program key and anti-copy sign are bound processing, obtain the decruption key of programme content.At last, use decruption key that the programme content ciphertext is decrypted processing, obtain the plaintext of programme content, carry out decodes and plays again.
Claims (5)
1. the digital literary property protection method of a digital versatile disk system; it uses and comprises the authentication management system of being made up of content protecting Authorization Manager, replication business Authorization Manager, security of system data management system and playback equipment Authorization Manager; by replication business authority manager, make Authorization Manager and encrypt replication business system that release manager forms and put the playback equipment that manager is formed by play authorization file manager, legitimate verification manager reconciliation heavy seeding, its key step is:
1) system authorization:
1. the replication business Authorization Manager in the authentication management system is that the replication business authority manager of replication business system provides the replication business authority with the offline mode, comprises the private key of replication business system in the replication business authority and contains the replication business certificate of replication business system unique ID;
2. the playback equipment Authorization Manager in the authentication management system is that the play authorization file manager of playback equipment provides the device authorization file with the offline mode, comprise in the device authorization file playback equipment private key, playback equipment unique ID and with private key one by one corresponding PKI device certificate and with the system key packet of playback equipment binding;
2) programme content mandate and protection:
1. the making Authorization Manager of the replication business system programme content that copyright is legal generates the digital content characteristic, and submits the content protecting authorized application to authentication management system;
2. the content protecting Authorization Manager of authentication management system generates the content certificate of binding with programme content, comprises unique ID, digital content characteristic and the digital signature of programme content in the content certificate;
3. the security of system data management system of authentication management system generates the security of system packet that comprises relevant playback equipment, replication business system and programme content revocation information, and content certificate and security of system packet packing generation content production authority are issued the replication business system;
3) programme content adds DecryptDecryption:
1. the encryption release manager of replication business system is carried out encryption to programme content, produces program key and CD anti-copying identification data, and program key and CD anti-copying identification data are bound processing, obtains the encryption key of digital content; Use encryption key and symmetric encipherment algorithm that programme content is carried out symmetric cryptography and handle, obtain the programme content ciphertext; Use replication business system's private key and rivest, shamir, adelman that the program ciphertext is carried out asymmetric encryption and handle, generate the program key file;
2. the encryption release manager of replication business system writes the CD anti-copying identification data in the system data area that CD not directly copies, and programme content ciphertext, program key file, security of system packet, content certificate and the packing of replication business certificate be recorded in the optical disc data district, be made into the program CD and externally issue;
3. the legitimate verification manager of playback equipment uses the legitimacy of the built-in device certificate verification system of security of system packet, content certificate, replication business certificate and playback equipment on the program CD;
4. the deciphering presentation manager of playback equipment is decrypted playback process to the programme content on the program CD: by resolving built-in system key packet and the replication business certificate on the CD, obtain the system key ciphertext of this CD correspondence; Use the playback equipment private key that said system key ciphertext is decrypted processing, obtain the system key of this CD correspondence; Use said system key and asymmetric arithmetic that the program key file on the program CD is carried out asymmetric decryption processing, obtain the program key of programme content; Program key and anti-copy sign are bound processing, obtain the decruption key of programme content; Use decruption key that the programme content ciphertext is decrypted processing, obtain the plaintext of programme content, carry out decodes and plays again.
2. the digital literary property protection method of digital versatile disk system according to claim 1; it is characterized in that; the binding of described and playback equipment is meant that all system keys in the system key packet are the ciphertexts after handling through the public key encryption of corresponding playback equipment, described system key packet be meant data that all system keys form together with its corresponding replication business system unique ID to and the data acquisition of digital signature.
3. the digital literary property protection method of digital versatile disk system according to claim 1 and 2; it is characterized in that; described security of system packet is meant the system data that is used for playback equipment deciphering legitimate verification, comprises illegal playback equipment, the bootlegging quotient system relevant revocation information of illegal contents of unifying.
4. the digital literary property protection method of digital versatile disk system according to claim 3; it is characterized in that; the legitimacy of described verification system is meant that the revocation information in the using system secure data bag verifies accordingly; after having only system's legitimacy to obtain confirming, playback equipment just can be decrypted processing.
5. realize the management devices of the digital literary property protection method of digital versatile disk system according to claim 1; it is characterized in that; it is by authentication management system (A); replication business system (B) and playback equipment (C) are formed; authentication management system (A) is by content protecting Authorization Manager (3); replication business Authorization Manager (1); security of system data management system (4) and playback equipment Authorization Manager (2) are formed; replication business system (B) is by replication business authority manager (5); make Authorization Manager (6) and encrypt release manager (7) composition; playback equipment (C) is by play authorization file manager (8); manager (10) composition is put in legitimate verification manager (9) reconciliation heavy seeding; authentication management system (A) is with the empowerment management of offline mode control replication business system (B) and playback equipment (C); replication business system (B) finishes encryption and the disc making and the issuing function of digital content, and playback equipment (C) is finished the legitimate verification and the deciphering playback process function of digital content.
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| CN2008102466053A CN101770794B (en) | 2008-12-26 | 2008-12-26 | Digital copyright protection method and management device thereof for digital video disc system |
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| CN2008102466053A CN101770794B (en) | 2008-12-26 | 2008-12-26 | Digital copyright protection method and management device thereof for digital video disc system |
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| CN101770794A CN101770794A (en) | 2010-07-07 |
| CN101770794B true CN101770794B (en) | 2011-08-03 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2413257B1 (en) * | 2010-07-26 | 2017-04-26 | Sony DADC Austria AG | Method for replacing an illegitimate copy of a software program with legitimate copy and corresponding system |
| CN106656499B (en) * | 2015-07-15 | 2023-05-05 | 同方股份有限公司 | Terminal equipment credibility authentication method in digital copyright protection system |
| CN105227300B (en) * | 2015-08-27 | 2019-09-20 | 北京百度网讯科技有限公司 | A kind of acquisition methods and system of key |
| CN106529751B (en) * | 2015-09-14 | 2023-09-29 | 同方股份有限公司 | Method for realizing offline revocation of digital copyright protection system |
| CN107306254B (en) * | 2016-04-21 | 2021-06-18 | 北京印刷学院 | Digital copyright protection method and system based on double-layer encryption |
| CN110213039B (en) * | 2018-02-28 | 2021-01-29 | 华为技术有限公司 | Management method, terminal and server |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101196973A (en) * | 2006-12-04 | 2008-06-11 | 华为技术有限公司 | Digital copyright protection method and system thereof |
| CN101313313A (en) * | 2006-03-29 | 2008-11-26 | 华为技术有限公司 | Digital literary property protection method, system, user equipment and multimedia server |
| CN101320408A (en) * | 2008-04-30 | 2008-12-10 | 钟勇 | Digital contents hardware binding and emigration method with both copyright sides controllable function |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101313313A (en) * | 2006-03-29 | 2008-11-26 | 华为技术有限公司 | Digital literary property protection method, system, user equipment and multimedia server |
| CN101196973A (en) * | 2006-12-04 | 2008-06-11 | 华为技术有限公司 | Digital copyright protection method and system thereof |
| CN101320408A (en) * | 2008-04-30 | 2008-12-10 | 钟勇 | Digital contents hardware binding and emigration method with both copyright sides controllable function |
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