CN102111642A - Method for bidirectional AIO to receive encrypted digital television without using cards - Google Patents
Method for bidirectional AIO to receive encrypted digital television without using cards Download PDFInfo
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- CN102111642A CN102111642A CN2009103123040A CN200910312304A CN102111642A CN 102111642 A CN102111642 A CN 102111642A CN 2009103123040 A CN2009103123040 A CN 2009103123040A CN 200910312304 A CN200910312304 A CN 200910312304A CN 102111642 A CN102111642 A CN 102111642A
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Abstract
The invention discloses a method for a bidirectional AIO (all-in-one) to receive encrypted digital television without using cards. The method comprises the following steps: connecting an interaction terminal to a server side, adopting digital certificate authentication method to authenticate the identity of the interaction terminal, using the interaction terminal to download the current small decryption algorithm routines of the server side through a data network or EMM (Entitlement Management Message) streams on a broadcast network after the completion of authentication, utilizing the EMM streams and digital signature manner to decrypt the small decryption algorithm routines, utilizing the small decryption algorithm routines to decrypt ECM (Entitlement Control Message) streams, restoring encrypted CW (Control World) streams on the server side, utilizing the CW streams to descramble AV (Audio/Video) streams which are scrambled, and restoring AV streams. Therefore, a user can watch an encrypted digital television without using cards. According to the method, the hardware structure is simple, the cost is lower, a receiving system can be encrypted in the same way as other receiving systems with cards; and the complexity of a terminal is simplified and the safety of a system is greatly improved and a real digital television AIO can be realized.
Description
Technical field
The present invention relates to a kind of method of enciphered digital TV, particularly relate to a kind of two-way all-in-one and realize that no card article spare receives the method for enciphered digital TV.
Background technology
At present, along with the progressively construction of digital television broadcasting net, and progressively the carrying out of every value-added service and ecommerce, condition receiving system has been subjected to users' common concern gradually as an important leverage system of Digital Television.Condition receives and to be meant the digital television program content of broadcasting is carried out digital interference (or claiming digital encryption) setting up effective charging system, thereby ensures the interests of program provider and TV station.Condition receiving system is a kind of technical guarantee system of Digital Television charge, and it is to promote the important step that Digital Television is moved towards market success.
The condition receiving system of prior art all is with the core of smart card (Smart Card) as system management, because different company adopts the different smart cards and the cryptographic algorithm of exploitation separately, cause each condition receiving system can not be compatible, so that give the integrated very big difficulty and chaotic that caused of operator and terminal manufacturer.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, provide a kind of two-way all-in-one to realize that no card article spare receives the method for enciphered digital TV, it utilizes the advantage of two-way interactive, realize separating of terminal authentication and cryptographic algorithm, make each Virtual network operator under the support that does not need hardware devices such as smart card, can change cryptographic algorithm arbitrarily, and prevent that the user from watching unauthorized TV programme.
The technical solution adopted for the present invention to solve the technical problems is: a kind of two-way all-in-one realizes that no card article spare receives the method for enciphered digital TV, comprising:
To be used for the two-way all-in-one of receiving digital television signal, but send the connection request that contains digital certificate information to the authentication module of the front end system that is used for sending digital television signal by the digital certificate module of the terminal system data network by bi-directional transfer of data as terminal system;
The authentication module of front end system authenticates in conjunction with the management information of the user management module digital certificate to terminal system, and sends the information of authentication success to terminal system by data network;
Terminal system is by the request of data network forward end system transmission download decryption algorithm small routine, and front end system sends the decipherment algorithm small routine by data network or radio network to terminal system;
In front end system: utilize the control word generation module generation control word sequence at random of front end system, form CW stream; Utilize the request of the subscriber authorisation module reception user management module of front end system to produce Entitlement Management Message, form EMM stream; The scrambler module of front end system is carried out scrambling as key to audio and video data streams with CW and is handled according to the DVB standard, forms scrambling AV stream; Utilize the encrypting module of front end system CW stream to be carried out encryption generation Entitlement Control Message, form ECM stream in conjunction with EMM stream; Utilize the Multiplexing module of front end system that scrambling AV stream, ECM stream and EMM stream are carried out multiplexing process, form TS stream;
Front end system sends to terminal system with TS stream by radio network;
In terminal system: utilize the demultiplexing module of terminal system that the TS stream that receives is carried out the demultiplexing processing, be separated into AV stream, ECM stream and the EMM stream of scrambling; Utilize the small routine module of terminal system to start the decipherment algorithm small routine in conjunction with the authorized order in the EMM stream and the digital signature of digital certificate module; The deciphering module that utilizes terminal system carries out decryption processing in conjunction with the decipherment algorithm small routine of small routine module to ECM stream, restores CW stream; The descrambler module of terminal system is carried out scramble process as key to scrambling AV stream with CW according to the DVB standard, restores AV transparent flow signal.
Described terminal system is by the request of data network forward end system transmission download decryption algorithm small routine, and front end system sends the decipherment algorithm small routine by data network to terminal system.
Described terminal system is by the request of data network forward end system transmission download decryption algorithm small routine, and front end system is carried in the decipherment algorithm small routine in the EMM stream and sends the decipherment algorithm small routine by radio network to terminal system.
A kind of two-way all-in-one of the present invention realizes that no card article spare receives the method for enciphered digital TV, the safety of system does not rely on any fixing condition and receives the enciphered digital television system, just in case will form brand-new system in system destruction under attack back as long as change the encryption and decryption small routine.Therefore system has very high fail safe.
A kind of two-way all-in-one of the present invention realizes that no card article spare receives the method for enciphered digital TV, because system adopts the digital certificate authentication method therefore without any need for the CA card that adds.
A kind of two-way all-in-one of the present invention realizes that no card article spare receives the method for enciphered digital TV, after two-way all-in-one (or set-top box) powers on start, the forward end certificate server is initiated connection request, set up encrypted tunnel, send digital certificate and authenticate, if authentication is passed through, then certificate server sends the deciphering small routine to terminal, the digital signature of terminal checking small routine has only qualified digital signature just to carry out small routine.The deciphering small routine has the term of validity, and before the term of validity lost efficacy, terminal needed download decryption small routine again.The client identity authentication proof is stored in the system management server, and each user has the identity code (ID) that is solidificated in the hardware.Digital certificate in machine and deciphering small routine can be changed by internet or radio network.As decipher small routine and digital certificate and make system pirate user occur because of assault or other reasons, system can mask all pirate users by changing deciphering small routine and digital certificate, makes system that very high fail safe be arranged.
The invention has the beneficial effects as follows, owing to adopt interactive terminal is connected on the server end, adopt the digital certificate authentication method that interactive terminal is carried out authentication, authentication is flowed down by the EMM of interactive terminal by data network or radio network by the back and carries the current decipherment algorithm small routine of server end, utilize EMM stream and digital signature mode that the algorithm small routine is decrypted processing, utilize this algorithm small routine that ECM stream is deciphered then, to restore CW stream encrypted on server end, the last CW stream that utilizes again is to being carried out scramble process by the AV stream of scrambling, restore AV stream, thereby realize that the user can not have the purpose of card article spare watching encrypted Digital Television.Therefore, the present invention has following some obvious superiority: at first, the present invention realizes with all-in-one (or set-top box), need not the interface of smart card and domestic other kilocalorie standards, has the advantages that hardware is simple, cost is low; Secondly, the present invention can with existing DVB system compatible, and can card CA system be arranged with close with other, do not influence the set-top box of having disposed; The 3rd, the present invention adopts bilateral network, carries out the digital TV integrated machine terminal authentication, can prevent unauthorized terminal received television program; The 4th, the present invention breaks the existing incompatible situation of various places cable TV, thereby has realized real digital TV integrated machine.
Below in conjunction with drawings and Examples the present invention is described in further detail; But a kind of two-way all-in-one of the present invention is realized the method for no card article spare reception enciphered digital TV and is not limited to embodiment.
Description of drawings
Fig. 1 is a theory diagram of the present invention.
Embodiment
Embodiment, a kind of two-way all-in-one of the present invention realizes that no card article spare receives the method for enciphered digital TV, its theory diagram sees also shown in Figure 1.The hardware components of realizing the inventive method comprises front end system 1, terminal system 2, radio network 3 and data network 4.Wherein, radio network 3 is realized the one-way data transmission, and data network 4 is realized bidirectional data transfers.
This front end system 1 comprises scrambler module 11, control word generation module 12, encrypting module 13, user management module 14, subscriber authorisation module 15, authentication module 16 and Multiplexing module 17; Authentication module 16 is connected with subscriber authorisation module 15 with user management module 14 respectively; The output of user management module 14 is connected to the input of subscriber authorisation module 15; The output of control word generation module 12 is connected to scrambler module 11 and encrypting module 13 respectively; The output of subscriber authorisation module 15 is connected to encrypting module 13 and Multiplexing module 17 respectively; The output of scrambler module 11, encrypting module 13 is connected to Multiplexing module 17 respectively.
This terminal system 2 comprises descrambler module 21, deciphering module 22, small routine module 23, digital certificate module 24 and demultiplexing module 25; Digital certificate module 24 is connected with small routine module 23; The output of demultiplexing module 25 connects descrambler module 21, deciphering module 22 and small routine module 23 respectively; Small routine module 23 is connected with deciphering module 22; The output of deciphering module 22 connects descrambler module 21.
It is AV stream that the input of scrambler module 11 connects audio and video data streams, scrambler module 11 is used for that audio and video data streams is carried out scrambling by the DVB standard and handles, the AV stream of scrambler module 11 output scramblings, the AV stream that is input as scrambling of descrambler module 21, descrambler module 21 is used for the audio and video data streams of scrambling is carried out scramble process by the DVB standard, scrambler module 11 and descrambler module 21 are symmetrical, and scrambling descrambling process is the same; Control word generation module 12 usefulness generate the control word sequence, guarantee the randomness of control word, and control word generation module 12 produces CW stream, and CW is used for audio, video data is carried out the random number of scrambling among the DVB, divide strange/even control word; User management module 14 is the user management and the charging platform of operator; Subscriber authorisation module 15 is used for receiving the request that user management module 14 is sent, and produces EMM stream, and EMM stream is to send the mandate of program provider to the user; Encrypting module 13 is used for CW stream is encrypted, and produces ECM stream, and ECM stream is to send the CW of encryption to the user; Multiplexing module 17 is with audio and video data streams, and basic stream such as ECM and EMM is multiplexed with a TS stream, and sends to terminal system 2 by radio network 3; Demultiplexing module 25 is according to PID TS stream to be carried out demultiplexing, isolates AV stream, ECM stream and the EMM stream of scrambling, and exports to descrambler module 21, deciphering module 22 and small routine module 23 respectively; Small routine module 23 is meant the simple functions program that operates in certain virtual environment; Authentication module 16 is according to user management module/digital certificate module authentication user whether mandate to be arranged, and realizes bidirectional data transfers by data network 4 between authentication module 16 and the digital certificate module 24; Digital certificate module 24 is used for a kind of certificate of indicate identification.
A kind of two-way all-in-one of the present invention realizes that no card article spare receives the method for enciphered digital TV, may further comprise the steps:
To be used for the two-way all-in-one of receiving digital television signal, but send the connection request that contains digital certificate information to the authentication module 16 of the front end system 1 that is used for sending digital television signal by the digital certificate module 24 of terminal system 2 data network 4 by bi-directional transfer of data as terminal system 2;
The authentication module 16 of front end system 1 authenticates in conjunction with the management information of user management module 14 digital certificate to terminal system 2, and sends the information of authentication successs to terminal system 2 by data network 4;
Terminal system 2 is by the request of data network 4 forward end systems 1 transmission download decryption algorithm small routine, and front end system 1 sends the decipherment algorithm small routine by data network 4 or radio network 3 to terminal system 1;
In front end system 1: utilize the control word generation module 12 generations control word sequence at random of front end system 1, form CW stream; Utilize the request of the subscriber authorisation module 15 reception user management modules 14 of front end system 1 to produce Entitlement Management Message, form EMM stream; The scrambler module 11 of utilizing front end system 1 is carried out scrambling as key to audio and video data streams with CW and is handled according to the DVB standard, forms scrambling AV stream; Utilize the encrypting module 13 of front end system 1 CW stream to be carried out encryption generation Entitlement Control Message, form ECM stream in conjunction with EMM stream; Utilize the Multiplexing module 17 of front end system 1 that scrambling AV stream, ECM stream and EMM stream are carried out multiplexing process, form TS stream;
In terminal system 2: utilize the TS stream of 25 pairs of receptions of demultiplexing module of terminal system 2 to carry out the demultiplexing processing, be separated into AV stream, ECM stream and the EMM stream of scrambling; Utilize the small routine module 23 of terminal system 2 to start the decipherment algorithm small routine in conjunction with the authorized order in the EMM stream and the digital signature of digital certificate module 24; The deciphering module 22 that utilizes terminal system 2 carries out decryption processing in conjunction with the decipherment algorithm small routine of small routine module 23 to ECM stream, restores CW stream; The descrambler module 21 of utilizing terminal system 2 is according to the DVB standard, as key the AV stream of scrambling carried out scramble process with CW, restores transparent AV stream signal.
Wherein, in the above-mentioned steps, when terminal system 2 sends the request of download decryption algorithm small routine by data network 4 forward end systems 1, front end system 1 can send the decipherment algorithm small routine to terminal system 2 by data network 4, perhaps sends decipherment algorithm small routine by radio network 3 to terminal system 2 by the decipherment algorithm small routine being carried in the EMM stream.
A kind of two-way all-in-one of the present invention realizes that no card article spare receives the method for enciphered digital TV, the safety of system does not rely on any fixing condition and receives the enciphered digital television system, just in case will form brand-new system in system destruction under attack back as long as change the encryption and decryption small routine.Therefore system has very high fail safe.
A kind of two-way all-in-one of the present invention realizes that no card article spare receives the method for enciphered digital TV, because system adopts the digital certificate authentication method therefore without any need for the CA card that adds.
A kind of two-way all-in-one of the present invention realizes that no card article spare receives the method for enciphered digital TV, after two-way all-in-one (or set-top box) powers on start, forward end certificate server 1 is initiated connection request, set up encrypted tunnel, send digital certificate and authenticate, if authentication is passed through, then certificate server 1 sends the deciphering small routine to terminal 2, the digital signature of terminal 2 checking small routines has only qualified digital signature just to carry out small routine.The deciphering small routine has the term of validity, and before the term of validity lost efficacy, terminal 2 needed download decryption small routine again.The client identity authentication proof is stored in the system management server, and each user has the identity code (ID) that is solidificated in the hardware.Digital certificate in machine and deciphering small routine can be changed by internet or radio network.As decipher small routine and digital certificate and make system pirate user occur because of assault or other reasons, system can mask all pirate users by changing deciphering small routine and digital certificate, guarantees that the safety of system is perfectly safe.
A kind of two-way all-in-one of the present invention realizes that no card article spare receives the method for enciphered digital TV, be to pass through terminal authentication, the deciphering small routine is downloaded on the all-in-one (or set-top box), carry out CW deciphering and descrambler descrambles, realized not having the purpose of card watching encrypted Digital Television.Can there be card article spare receiving system in this no card system of the present invention with close with other, and this has simplified the complexity of terminal greatly, and has reduced certain cost.
The foregoing description only is used for further specifying a kind of two-way all-in-one of the present invention and realizes that no card article spare receives the method for enciphered digital TV; but the present invention is not limited to embodiment; every foundation technical spirit of the present invention all falls in the protection range of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment did.
Claims (3)
1. a two-way all-in-one realizes that no card article spare receives the method for enciphered digital TV, is characterized in that: comprising:
To be used for the two-way all-in-one of receiving digital television signal, but send the connection request that contains digital certificate information to the authentication module of the front end system that is used for sending digital television signal by the digital certificate module of the terminal system data network by bi-directional transfer of data as terminal system;
The authentication module of front end system authenticates in conjunction with the management information of the user management module digital certificate to terminal system, and sends the information of authentication success to terminal system by data network;
Terminal system is by the request of data network forward end system transmission download decryption algorithm small routine, and front end system sends the decipherment algorithm small routine by data network or radio network to terminal system;
In front end system: utilize the control word generation module generation control word sequence at random of front end system, form CW stream; Utilize the request of the subscriber authorisation module reception user management module of front end system to produce Entitlement Management Message, form EMM stream; The scrambler module of front end system is carried out scrambling as key to audio and video data streams with CW and is handled according to the DVB standard, forms scrambling AV stream; Utilize the encrypting module of front end system CW stream to be carried out encryption generation Entitlement Control Message, form ECM stream in conjunction with EMM stream; Utilize the Multiplexing module of front end system that scrambling AV stream, ECM stream and EMM stream are carried out multiplexing process, form TS stream;
Front end system sends to terminal system with TS stream by radio network;
In terminal system: utilize the demultiplexing module of terminal system that the TS stream that receives is carried out the demultiplexing processing, be separated into AV stream, ECM stream and the EMM stream of scrambling; Utilize the small routine module of terminal system to start the decipherment algorithm small routine in conjunction with the authorized order in the EMM stream and the digital signature of digital certificate module; The deciphering module that utilizes terminal system carries out decryption processing in conjunction with the decipherment algorithm small routine of small routine module to ECM stream, restores CW stream; The descrambler module of terminal system is carried out scramble process as key to scrambling AV stream with CW according to the DVB standard, restores AV transparent flow signal.
2. two-way all-in-one according to claim 1 realizes that no card article spare receives the method for enciphered digital TV, it is characterized in that: described terminal system sends the request of download decryption algorithm small routine by data network forward end system, front end system sends the decipherment algorithm small routine by data network to terminal system after the identity of digital certificate verification terminal system.
3. two-way all-in-one according to claim 1 realizes that no card article spare receives the method for enciphered digital TV, it is characterized in that: described terminal system is by the request of data network forward end system transmission download decryption algorithm small routine, and front end system is carried in the decipherment algorithm small routine in the EMM stream and sends the decipherment algorithm small routine by radio network to terminal system.
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| CN2009103123040A CN102111642A (en) | 2009-12-25 | 2009-12-25 | Method for bidirectional AIO to receive encrypted digital television without using cards |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102244578A (en) * | 2011-08-02 | 2011-11-16 | 马平 | Identity authentication method |
| CN102291598A (en) * | 2011-09-06 | 2011-12-21 | 四川金网通电子科技有限公司 | Controllable license management method of digital television hardware function |
| CN104853242A (en) * | 2015-05-13 | 2015-08-19 | 青岛海信电器股份有限公司 | Descrambling method and apparatus of digital television set |
| CN105959738A (en) * | 2016-06-22 | 2016-09-21 | 北京数字太和科技有限责任公司 | Bidirectional conditional access system and method |
| CN107645679A (en) * | 2017-09-30 | 2018-01-30 | 深圳市九洲电器有限公司 | The production method and system of set top box cardless conditional access system |
| CN107950032A (en) * | 2015-07-29 | 2018-04-20 | 萨热姆通信宽带简易股份有限公司 | Apparatus and method for changing encrypting multimedia data stream |
| CN112449215A (en) * | 2019-08-27 | 2021-03-05 | 武汉佳世创科技有限公司 | Method and system for supporting card-holding and card-free condition receiving based on digital television |
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| CN201294575Y (en) * | 2008-11-25 | 2009-08-19 | 浪潮电子信息产业股份有限公司 | CA terminal integrated with digital television set-top box |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201294575Y (en) * | 2008-11-25 | 2009-08-19 | 浪潮电子信息产业股份有限公司 | CA terminal integrated with digital television set-top box |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102244578A (en) * | 2011-08-02 | 2011-11-16 | 马平 | Identity authentication method |
| CN102291598A (en) * | 2011-09-06 | 2011-12-21 | 四川金网通电子科技有限公司 | Controllable license management method of digital television hardware function |
| CN104853242A (en) * | 2015-05-13 | 2015-08-19 | 青岛海信电器股份有限公司 | Descrambling method and apparatus of digital television set |
| CN107950032A (en) * | 2015-07-29 | 2018-04-20 | 萨热姆通信宽带简易股份有限公司 | Apparatus and method for changing encrypting multimedia data stream |
| CN107950032B (en) * | 2015-07-29 | 2020-07-10 | 萨热姆通信宽带简易股份有限公司 | Apparatus and method for modifying an encrypted multimedia data stream |
| CN105959738A (en) * | 2016-06-22 | 2016-09-21 | 北京数字太和科技有限责任公司 | Bidirectional conditional access system and method |
| CN105959738B (en) * | 2016-06-22 | 2018-11-30 | 北京数字太和科技有限责任公司 | A kind of bidirectional conditional reception system and method |
| CN107645679A (en) * | 2017-09-30 | 2018-01-30 | 深圳市九洲电器有限公司 | The production method and system of set top box cardless conditional access system |
| CN107645679B (en) * | 2017-09-30 | 2020-02-07 | 深圳市九洲电器有限公司 | Production method and system of card-free condition receiving system of set top box |
| CN112449215A (en) * | 2019-08-27 | 2021-03-05 | 武汉佳世创科技有限公司 | Method and system for supporting card-holding and card-free condition receiving based on digital television |
| CN112449215B (en) * | 2019-08-27 | 2022-11-08 | 武汉佳世创科技有限公司 | Method and system for supporting card-holding and card-free condition receiving based on digital television |
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Application publication date: 20110629 |