CN100477784C - Implementation method for replacing conditional receiving system in two stages - Google Patents
Implementation method for replacing conditional receiving system in two stages Download PDFInfo
- Publication number
- CN100477784C CN100477784C CNB2005101057879A CN200510105787A CN100477784C CN 100477784 C CN100477784 C CN 100477784C CN B2005101057879 A CNB2005101057879 A CN B2005101057879A CN 200510105787 A CN200510105787 A CN 200510105787A CN 100477784 C CN100477784 C CN 100477784C
- Authority
- CN
- China
- Prior art keywords
- program
- receiving system
- digital
- operator
- content supplier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
Cooperation between digital royalty management (DRM) and conditional acceptance system (CAS) accomplishes two stages conditional acceptance function of digital TV. DRM server is setup at upper level (content provider), and DRM client end is setup at lower level (program operator). DRM server scrambles content of digital media down loaded from upper level. DRM server uses signature of cryptographic key to encrypt program. After encryption, the encrypted program is down loaded to DRM client end, which decrypts the encrypted program. After signature is validated, the cryptographic key for encrypting program is encrypted and sent to CAS in lower level so as to realize control of program source. After obtaining permission from DRM server, DRM client end sends users's certificate to CAS in lower level, and then through the CAS, certificates are sent to users. It is needed to apply for reception permission from DRM client end when users in lower level to watch programs in upper level.
Description
Technical field
The invention belongs to the digital television broadcasting category, relate to a kind of replacement method that realizes conditional receiving system in two stages.
Background technology
Along with digital television broadcasting industry carrying out in China, condition receiving system ((Conditional AccessSystem, CAS) breaking with the advertisement as broadcast television industry is the one-product operation theory of principal income, realize the technical foundation and the strong instrument of multi-channel management income, more and more receive the concern of operator.CAS is a whole set of system that the user is provided authorization control, empowerment management and terminal set-top box program receiving.The scrambling that has realized video, audio frequency and data message at front end is transmitted, and set-top box has realized the process that the program descrambling receives endways.The user buys program, utilizes the set-top box that links to each other with TV to watch the program of purchase.In the transportation of CAS, the higher level, be program provider and subordinate, be that program operator often will run on the same stage, this just relates to the problem how operator of the superior and the subordinate controls oneself program, user and mandate, so, present multistage CAS operation scheme has just been arranged.In the now general multistage CAS operation scheme; require the CAS of the superior and the subordinate must adopt identical cas system; do not support to adopt different cas systems; like this; though multistage CAS has played the effect of protection copyright with the mode that directly controls to the user; but this practice has hindered the development of downstream operator, has also brought great resistance for the popularization of Digital Television.The reality that the dual role of program provider and operator of subordinate exist can exist in considerable time from now on, and the Digital Television industry of China develops again, so, (Digital rights management DRM) is incorporated into Digital Television and this problem is solved in the IPTV field digital copyright management for we.DRM is a kind of method of protecting digital multimedia content not to be subjected to illegal infringement.The DRM technology judges by encrypted digital content and additional information whether the user has the right to use this content, only uses those users that obtained the authorization are open to guarantee content.Combine by DRM and CAS, when realizing the multistage operation of Digital Television, can promote the fast development of Digital Television industry.
Summary of the invention
The purpose of this invention is to provide a kind of replacement method that realizes conditional receiving system in two stages, realize effective control and the management of the superior and the subordinate program, user and mandate separately.
For achieving the above object, the invention provides a kind of replacement method that realizes conditional receiving system in two stages, match by DRM and CAS and realize the operation on the same stage of two-stage operator, mainly comprise:
A, place a DRM server at content supplier place, place a drm agent and a CAS at program operator place, it is integrated for program operator that content supplier formulates a drm agent standard interface, behind the CAS of the program operator integration standard interface, cooperate with drm agent the user is controlled;
B, content supplier pass digital media content DRM server scrambling down, pass down in real time via satellite, after the DRM server signs the ciphered program key, encrypt, by passing to drm agent under VPN(Virtual Private Network)/Internet Protocol (IP), drm agent to ciphered program be decrypted, by behind the certifying signature, the ciphered program key is encrypted with business cipher key (ServiceKey), send to the CAS of program operator, pass to the user under the CAS of program operator, after the user obtains ServiceKey, the enabling decryption of encrypted program key is watched program;
C, drm agent are given the CAS of program operator with user certificate after the permission that obtains the DRM server, by passing to the user place under the CAS of program operator, be saved in the user smart card, thus the control that realization is opened an account to the program provider customer; The program provider customer watches content supplier's program, need watch permission to the drm agent application, drm agent is after the permission that obtains the DRM server, after watching permission, feed back to the CAS of program operator with user certificate signature, encryption, by passing to user smart card under the CAS of program operator, in smart card, behind deciphering, the certifying signature, preserve ServiceKey in user smart card;
The scrambled program that D, program provider customer view content provider pass down obtains the ciphered program key with the ServiceKey deciphering and can normally watch program.
Above-mentioned steps A is described, and content supplier is not as long as the standard interface of working out a drm agent for the integrated use of program operator, requires that program operator must adopt the CAS same with content supplier.
Described in the above-mentioned steps B, the scrambling of content supplier's program can be used the DRM server, also can use existing scrambling system, just need pass to the DRM server to the ciphered program key.
Described in the above-mentioned steps B, content supplier's scrambled program can real-time Transmission, passes under also can be when program operator needs.
Described in the above-mentioned steps B, content supplier's scrambled program can be by transmitting including but not limited to satellite, wired, wireless, IP, VPN channel.
Described in the above-mentioned steps B, when the DRM server passed the ciphered program key down, key will be done safe handling.
Described in the above-mentioned steps B, drm agent to ciphered program be decrypted, by behind the certifying signature, the ciphered program key is encrypted with ServiceKey, send to the CAS of program operator, pass to the user under the CAS of program operator, after the user obtained ServiceKey, the enabling decryption of encrypted program key was watched program.
Described in the above-mentioned steps C, the content of watching permission including but not limited to ServiceKey, watch number of times.
Described in the above-mentioned steps C, the deposit position of user certificate and the deposit position of ServiceKey are including but not limited to smart card.
Description of drawings
Further specify characteristics of the present invention below in conjunction with drawings and Examples.
Accompanying drawing 1 does not have a kind of scheme block diagram that realizes the replacement method of conditional receiving system in two stages of CAS for content supplier.
Accompanying drawing 2 has a kind of scheme block diagram that realizes the replacement method of conditional receiving system in two stages of CAS for content supplier.
Embodiment
Please refer to accompanying drawing 1, do not have a kind of scheme block diagram that realizes the replacement method of conditional receiving system in two stages of CAS for content supplier.Whole proposal is divided into two parts of content supplier (content supplier) and program operator (program operator), and in this programme, content supplier's program Channel Transmission via satellite follows this programme similar to program operator by the situation of other Channel Transmission.In content supplier, one or more TS (transport stream) stream of program provider is input to multiplexing formation one road TS stream of multiplexer (101), TS stream after multiplexing outputs to the DRM server and carries out scrambling (102), TS after the scrambling spreads and gives QPSK (Quadrature Phase Shift Keying modulation) modulator and carry out modulation treatment (103), the corresponding qpsk modulator of each road TS stream is handled the back through qpsk modulator and is transmitted into satellite channel (105) by transmitter (104); Simultaneously, after DRM server (102) signs the ciphered program key, encrypt, by passing to each drm agent (112) under the VPN/IP.In program operator, drm agent deciphering, certifying signature send to the CAS of program operator after by the back ciphered program key that obtains being encrypted with ServiceKey.Satellite receiver (107) is antenna (106) received signal and be converted into TS stream from satellite channel via satellite, TS stream with this locality enters multiplexer scrambler (108) together again, simultaneously, multiplexing scrambler and the CAS of program operator cooperate the scrambling of finishing program operator program, the encryption of data and to the transparent transmission of content supplier's program, the TS of output flows through and enters HFC (cable television network) (109) after QAM (quadrature amplitude modulation) modulator is handled, send into set-top box (110), set-top box is handled TS stream, and the TS after will handling sends into the CAS module in the set-top box, give smart card, smart card is by ServiceKey enabling decryption of encrypted program key, and give set-top box with program key, finish authorizing the descrambling of program by set-top box.
Please refer to accompanying drawing 2, a kind of scheme block diagram that realizes the replacement method of conditional receiving system in two stages of CAS is arranged for content supplier.Whole proposal is divided into two parts of content supplier (content supplier) and program operator (program operator), and in this programme, content supplier's program Channel Transmission via satellite follows this programme similar to program operator by the situation of other Channel Transmission.In content supplier, one or more TS stream of program provider is input to multiplexing scrambler (101), and and the CAS of content supplier (110) cooperate and to finish the scrambling of program and the encryption of data, TS after the scrambling spreads and gives qpsk modulator and carry out modulation treatment (102), the corresponding qpsk modulator of each road TS, the TS that handles through qpsk modulator transmitter (103) of flowing through is transmitted into satellite channel (104); Simultaneously, DRM server (111) obtains the ciphered program key from CAS, after ciphered program key signature, encryption, by passing to each drm agent (112) under the VPN/IP.In program operator, drm agent deciphering, certifying signature send to the CAS of program operator (113) after by the back ciphered program key that obtains being encrypted with ServiceKey.Satellite receiver (106) is antenna (105) received signal and be converted into TS stream from satellite channel via satellite, TS stream with this locality enters multiplexing scrambler (107) together again, simultaneously, multiplexing scrambler and the CAS of program operator cooperate the scrambling of finishing program operator program, the encryption of data and to the transparent transmission of content supplier's program, the TS of output flows through and enters HFC after QAM modulator (108) is handled, send into set-top box (109), set-top box is handled TS stream, and the TS stream after will handling is sent into set-top box CAS module, give smart card, smart card is by ServiceKey enabling decryption of encrypted program key, and give set-top box with program key, finish authorizing the descrambling of program by set-top box.
Claims (12)
1, a kind of replacement method that realizes conditional receiving system in two stages mainly comprises:
A, place a digital version authority management server at content supplier place, place a digital publishing rights administrative client and a condition receiving system at program operator place, it is integrated for program operator that content supplier formulates a digital publishing rights administrative client standard interface, behind the condition receiving system integration standard interface of program operator, cooperate with the digital copyright management client user is controlled;
B, content supplier passes digital media content digital rights management service device scrambling down, pass down in real time via satellite, the digital rights management service device is signed the ciphered program key, after the encryption, by passing to the digital copyright management client under Virtual Private Network/Internet Protocol, the digital copyright management client is decrypted ciphered program, behind certifying signature, the key of ciphered program is encrypted with business cipher key, send to the condition receiving system of program operator, pass to the user under the condition receiving system of program operator, after the user obtains business cipher key, the enabling decryption of encrypted program key is watched program;
C, digital copyright management client are after the permission that obtains the digital rights management service device, user certificate is given the condition receiving system of program operator, pass to the user place under the condition receiving system by program operator, be saved in the user smart card, thus the control that realization is opened an account to the program provider customer; The program provider customer watches content supplier's program, need watch permission to the application of digital copyright management client, the digital copyright management client is after the permission that obtains the digital rights management service device, the condition receiving system that feeds back to program operator after watching permission with user certificate signature, encryption, pass to user smart card under the condition receiving system by program operator, in smart card, behind deciphering, the certifying signature, preserve business cipher key in user smart card;
The scrambled program that D, program provider customer view content provider pass down obtains the ciphered program key with the business cipher key deciphering and can normally watch program.
2, a kind of replacement method that realizes conditional receiving system in two stages according to claim 1, it is characterized in that B is the control procedure of digital copyright management to program source, there is not any restricting relation in the control procedure that C provides certificate for the digital copyright management client and the user watches permission between B and the C.
3, a kind of replacement method that realizes conditional receiving system in two stages according to claim 1 is characterized in that program operator can be for a plurality of, and a digital publishing rights administrative client and a condition receiving system need be placed by each program operator.
4, a kind of replacement method that realizes conditional receiving system in two stages according to claim 1, it is characterized in that when content supplier's conditional access system, by condition receiving system scrambled number media content, without the scrambling of digital rights management service device, only need condition receiving system pass to the digital rights management service device to the ciphered program key, content supplier's condition receiving system need not be identical condition receiving system with program operator condition receiving system.
5, a kind of replacement method that realizes conditional receiving system in two stages according to claim 1; it is characterized in that the program of content supplier with digital copyright management protection oneself; between program operator and user, the program that the mode that program operator combines with the condition receiving system of digital copyright management and program operator accurately draws oneself up.
6, a kind of replacement method that realizes conditional receiving system in two stages according to claim 1, it is characterized in that content supplier's scrambled program does not need descrambling to program operator, the program provider customer need obtain the permission of content supplier's digital rights management service device, just can watch program.
7, a kind of replacement method that realizes conditional receiving system in two stages according to claim 1 is characterized in that content supplier arrives the signal transmission form of program operator including but not limited to the satellite-signal transmission means among the B.
8, a kind of replacement method that realizes conditional receiving system in two stages according to claim 1 is characterized in that content supplier arrives the transmission of program operator including but not limited to passing down in real time among the B.
9, a kind of replacement method that realizes conditional receiving system in two stages according to claim 1, the deposit position that it is characterized in that the deposit position of user certificate among the C and business cipher key is including but not limited to smart card.
10, a kind of replacement method that realizes conditional receiving system in two stages according to claim 1, when it is characterized in that the digital rights management service device passes through to pass the ciphered program key under Virtual Private Network/Internet Protocol, key will be done safe handling.
11, a kind of replacement method that realizes conditional receiving system in two stages according to claim 1, the content that it is characterized in that watching among the C permission including but not limited to business cipher key, watch number of times.
12, a kind of replacement method that realizes conditional receiving system in two stages according to claim 1 is characterized in that content supplier can grasp information and measure, watches number of times, watches the time limit including but not limited to the program provider customer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101057879A CN100477784C (en) | 2005-09-29 | 2005-09-29 | Implementation method for replacing conditional receiving system in two stages |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101057879A CN100477784C (en) | 2005-09-29 | 2005-09-29 | Implementation method for replacing conditional receiving system in two stages |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1761315A CN1761315A (en) | 2006-04-19 |
| CN100477784C true CN100477784C (en) | 2009-04-08 |
Family
ID=36707232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101057879A Expired - Fee Related CN100477784C (en) | 2005-09-29 | 2005-09-29 | Implementation method for replacing conditional receiving system in two stages |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100477784C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1921614B (en) * | 2006-09-27 | 2010-06-23 | 华为技术有限公司 | Method and system for media data scrambling |
| US20090323971A1 (en) * | 2006-12-28 | 2009-12-31 | Munguia Peter R | Protecting independent vendor encryption keys with a common primary encryption key |
| US7965839B2 (en) * | 2008-02-19 | 2011-06-21 | Sony Corporation | Encryption system for satellite delivered television |
| CN101583012B (en) * | 2008-05-12 | 2011-08-03 | 北京视博数字电视科技有限公司 | Method for realizing two-stage condition receiving system and front end and final end of two-stage condition receiving system |
| CN102111651A (en) * | 2009-12-24 | 2011-06-29 | 北京视博数字电视科技有限公司 | Method for recording program, method for broadcasting program, front end and terminal equipment |
| CN101815071B (en) * | 2010-04-01 | 2014-04-16 | 北京数码视讯科技股份有限公司 | Method, device and system for applying for digital certificate |
| CN102387407A (en) * | 2010-08-31 | 2012-03-21 | 国基电子（上海）有限公司 | System and method for realizing broadcasting network conditional access (CA) |
| CN102263995A (en) * | 2011-08-22 | 2011-11-30 | 广州长嘉电子有限公司 | Simulcrypt-technology-based conditional access method and system |
| CN105141976A (en) * | 2015-08-14 | 2015-12-09 | 湖南兆华世纪新媒体技术有限公司 | Hierarchical encryption method for television programs in digital television broadcasting network |
-
2005
- 2005-09-29 CN CNB2005101057879A patent/CN100477784C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1761315A (en) | 2006-04-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100477784C (en) | Implementation method for replacing conditional receiving system in two stages | |
| US7698568B2 (en) | System and method for using DRM to control conditional access to broadband digital content | |
| CA2173176C (en) | Data security scheme for point-to-point communication sessions | |
| TWI415463B (en) | Methods and apparatus for securing communications between a decryption device and a television receiver | |
| WO2009108518A4 (en) | Encryption system for satellite delivered television | |
| GB2489672A (en) | Authentication certificate distribution to set top boxes | |
| EP1690367A2 (en) | System and method for using drm to control conditional access to broadband digital content | |
| CN101207794B (en) | Method for enciphering and deciphering number copyright management of IPTV system | |
| GB2489671A (en) | Cryptographic key distribution for IPTV | |
| CN103281572B (en) | The DVB conditional receiving device of integrated master data, normal data descrambling | |
| US20070217603A1 (en) | Decryption key reuse in encrypted digital data stream distribution systems | |
| CN101202883B (en) | System for numeral copyright management of IPTV system | |
| CN102340702A (en) | IPTV (Internet protocol television) network playing system and rights management and descrambling method based on USB (Universal serial bus) Key | |
| CN101505400B (en) | Bi-directional set-top box authentication method, system and related equipment | |
| CN101442660B (en) | System for receiving download type digital television condition and dynamic download method thereof | |
| CA2856456C (en) | Method, cryptographic system and security module for descrambling content packets of a digital transport stream | |
| KR101175354B1 (en) | System and method for securing content by using a number of conditional access systems | |
| KR20060113091A (en) | Conditional access system in digital receiver | |
| JP2004208107A (en) | Scrambled broadcast system, broadcast transmission device, and reception device | |
| EP2373017A2 (en) | Broadcast transceiver and pcmcia scrambler with reception limitation function implemented by using dvb-ci interface | |
| JP5613066B2 (en) | Conditional reception system, conditional reception method, and conditional reception program | |
| JP4569232B2 (en) | VOD system | |
| US20240056651A1 (en) | Digital rights management using a gateway/set top box without a smart card | |
| JP2008092187A (en) | Receiver, transmitter, and communication method | |
| JP2008092178A (en) | Receiver, transmitter, and authentication method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090408 Termination date: 20200929 |