CN105704526B - DRM method and system, TV gateway and the terminal of DTV - Google Patents
DRM method and system, TV gateway and the terminal of DTV Download PDFInfo
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- CN105704526B CN105704526B CN201511023336.0A CN201511023336A CN105704526B CN 105704526 B CN105704526 B CN 105704526B CN 201511023336 A CN201511023336 A CN 201511023336A CN 105704526 B CN105704526 B CN 105704526B
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- 238000000034 method Methods 0.000 title claims abstract description 72
- 230000008569 process Effects 0.000 claims description 45
- 238000013475 authorization Methods 0.000 claims description 13
- 230000005611 electricity Effects 0.000 claims description 9
- 238000012795 verification Methods 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 2
- 230000006870 function Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 5
- 238000004590 computer program Methods 0.000 description 4
- 230000002452 interceptive effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/4104—Peripherals receiving signals from specially adapted client devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/43615—Interfacing a Home Network, e.g. for connecting the client to a plurality of peripherals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/4405—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving video stream decryption
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/4408—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving video stream encryption, e.g. re-encrypting a decrypted video stream for redistribution in a home network
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
- H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
- H04N21/4627—Rights management associated to the content
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/61—Network physical structure; Signal processing
- H04N21/615—Signal processing at physical level
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/633—Control signals issued by server directed to the network components or client
- H04N21/6332—Control signals issued by server directed to the network components or client directed to client
- H04N21/6334—Control signals issued by server directed to the network components or client directed to client for authorisation, e.g. by transmitting a key
- H04N21/63345—Control signals issued by server directed to the network components or client directed to client for authorisation, e.g. by transmitting a key by transmitting keys
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/835—Generation of protective data, e.g. certificates
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Databases & Information Systems (AREA)
- Computer Networks & Wireless Communication (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses the DRM method and systems and TV gateway and terminal of DTV.The present invention is implemented among the TV gateway using safety chip and the terminal using safety chip, TV gateway completes condition reception and DRM encryption by the safety chip of itself, terminal carries out DRM decryption using the safety chip of itself, and the present invention can effectively guarantee the safety of TV gateway forwarding digital TV contents.
Description
Technical field
The present invention relates to digital copyright management fields, in particular it relates to a kind of realization side DRM of DTV
Method, DRM realization system, a kind of TV gateway and a kind of terminal of a kind of DTV.
Background technique
Currently, digital home and smart home have become radio and TV operator, telecom operators, consumer electronics manufacturer, mutually
The focus point of networking enterprise, home gateway become the important control node of digital home and smart home.On May 15th, 2015,
Domestic cable network operator of, Gehua Cable wired by Guangdong etc. 11 and the enterprise of related industry initiate to have set up home intelligent
Gateway industry alliance, the tissue are a wisdom industrial organization based on CHINA RFTCOM Co Ltd towards family.DTV gateway conduct
The medium that digital television signal is forwarded to intelligent terminal, becomes one of Main Morphology of home gateway.Currently, major broadcasting and TV fortune
It seeks in the DTV gateway scheme that quotient releases, mainly solves the protocol conversion that forward to intelligent terminal of digital television signal and mutual
Join intercommunication problem, shuts the reception for completing digital television program, CA (Conditional Access, condition in digital tv network
Receive) it authorizes and descrambles, transparency bit stream is then forwarded into other intelligent terminals in a manner of IP agreement etc., which results in code stream robbers
The risk taken receives the query of content supplier, affects the popularization of DTV gateway.
General Bureau of Radio, Film and Television, which is published, with national news in May, 2014 promulgates " 277-2014 internet television digital version of GY/T
Weigh administrative skill specification " (hereinafter referred to as ChinaDRM standard), define content encapsulation format, right expression and authorization, right
Agreement, trust and security system etc. are obtained, is DRM (Digital Rights Management, digital copyright management) system
Realization provides new standard foundation.China DRM standard is in internet television, IPTV (Interactive
Personality TV, Interactive Internet TV) etc. fields be widely used.
To meet operator and content quotient to the safety requirements of DRM terminal, it is therefore desirable to propose that one kind can be improved number
The technical solution of the safety of the digital TV contents of TV gateway forwarding.
Summary of the invention
It is an object of the present invention to provide the safeties for the digital TV contents that can be improved the forwarding of DTV gateway
New technical solution.
According to the first aspect of the invention, a kind of DRM implementation method of DTV is provided, is implemented on and uses safe core
Among the TV gateway of piece and the terminal of use safety chip, the TV gateway includes digital TV receiver module, safe core
Piece, gateway service module and network module, the terminal include network module, medium process module and safety chip,
The described method includes:
Digital television signal receiving step, for receiving DTV by the digital TV receiver module of the TV gateway
Radiofrequency signal completes demodulation, obtains digital television code stream；
Digital television code stream descrambling step, for obtaining condition reception authorization by the safety chip of the TV gateway,
Digital television code stream is descrambled after authorizing successfully；
Digital television code stream encrypting step, for generating content key by the safety chip of the TV gateway, using interior
Hold key and encrypts the digital television code stream descrambled out；
Digital television code stream forwards step, for the gateway service module by the TV gateway from the TV gateway
Encrypted digital television code stream is read in safety chip, the network module through the TV gateway is forwarded to the net of the terminal
Network module, the network module of the terminal receive the media that the terminal is sent to after the encrypted digital television code stream
Processing module；
Content key obtaining step, for the medium process module by the terminal, network module, institute through the terminal
The network module of TV gateway is stated to the gateway service module request content key of the TV gateway, includes institute in the request
State the certificate of terminal；After the gateway service module of the TV gateway receives the request comprising terminal certificate, by terminal certificate
The legitimacy of verification terminal certificate is set into the safety chip of the TV gateway；The safety chip of the TV gateway verifies
After terminal certificate passes through, the public key encryption content key in using terminal certificate obtains encrypted content key；The TV
The encrypted content key is returned to the gateway service module of the TV gateway by the safety chip of gateway, then successively
Return to the network module of the TV gateway, the network module of the terminal, the terminal medium process module；
Digital television code stream decryption step, the encrypted number that will be received for the medium process module by the terminal
Word TV code flow and encrypted content key are sent to the safety chip of the terminal, and the safety chip of the terminal uses institute
It states the terminal secret key stored in the safety chip of terminal and decrypts encrypted content key to obtain content key, then using interior
Hold digital television code stream encrypted described in key pair to be decrypted.
Preferably, the method also includes digital television code streams to play step, will for the safety chip by the terminal
The hardware demultiplexing module that digital television code stream after decryption is sent to the terminal is demultiplexed, then by the terminal
Hardware decoder decoded output.
Preferably, the gateway service module of the TV gateway is run in the master chip of TV gateway, the terminal
Medium process module is run in the master chip of terminal.
Preferably, it in the digital television code stream descrambling step, is connect by the condition of the safety chip of the TV gateway
The condition reception Entitlement Management Message in modular filtration digital television code stream is received to obtain authorization.
Preferably, safety time needed for the authorization is mentioned by the secure clock module of the safety chip of the TV gateway
For.
Preferably, in the digital television code stream descrambling step, by the descrambler of the safety chip of the TV gateway
Complete the descrambling to digital television code stream.
Preferably, in the digital television code stream encrypting step, the content key by the TV gateway peace
The randomizer of full chip generates.
Preferably, in the digital television code stream encrypting step, by the scrambler of the safety chip of the TV gateway
Digital television code stream out is descrambled using content key encryption.
Preferably, in the secure storage for the safety chip that the certificate and private key of the terminal are stored in the terminal.
Preferably, in the content key obtaining step, the safety chip verification terminal certificate of the TV gateway
Legitimacy is completed by the digital rights management module of the safety chip of the TV gateway.
Preferably, in the digital television code stream decryption step, it is by institute that encrypted content key, which is decrypted,
The digital rights management module for stating the safety chip of terminal is completed.
Preferably, in the digital television code stream decryption step, encrypted digital television code stream, which is decrypted, is
It is completed by the descrambler of the safety chip of the terminal.
According to the second aspect of the invention, the DRM for providing a kind of DTV realizes system, including uses safety chip
TV gateway and using safety chip terminal, the TV gateway includes digital TV receiver module, safety chip, gateway
Service module and network module, the terminal include network module, medium process module and safety chip, in which:
The digital TV receiver module of the TV gateway is completed demodulation, is obtained for receiving digital television radio-frequency signal
Digital television code stream；
The safety chip of the TV gateway descrambles DTV after authorizing successfully for obtaining condition reception authorization
Code stream；Then content key is generated, descrambles digital television code stream out using content key encryption；
The gateway service module of the TV gateway, it is encrypted for being read from the safety chip of the TV gateway
The encrypted digital television code stream is transmitted to the network module of the TV gateway by digital television code stream；
The network module of the TV gateway, for the encrypted digital television code stream to be forwarded to the terminal
Network module；
The network module of the terminal, the encrypted number that the network module for receiving the TV gateway forwards
The encrypted digital television code stream is transmitted to the medium process module of the terminal by word TV code flow；
The medium process module of the terminal, for being demonstrate,proved to the gateway service module request using terminal of the TV gateway
The content key that public key encryption in book is crossed, and by the encrypted digital television code stream received and encrypted content key
It is sent to the safety chip of the terminal；
The safety chip of the terminal, the terminal secret key for storing in the safety chip using the terminal decrypt encryption
The content key crossed then solves the encrypted digital television code stream using content key with obtaining content key
It is close.
Preferably, the safety chip of the terminal is also used to for the digital television code stream after decryption being sent to the master of terminal
Chip；The master chip of the terminal is also used to demultiplex the digital television code stream after the decryption, is defeated after decoding process
Out.
Preferably, the gateway service module of the TV gateway is integrated in the master chip of TV gateway, the terminal
Medium process module is integrated in the master chip of terminal.
Preferably, the medium process module of the terminal, for network module, the TV gateway through the terminal
Network module includes the card of the terminal in the request to the gateway service module request content key of the TV gateway
Book；The gateway service module of the TV gateway arrives terminal certificate setting after receiving the request comprising terminal certificate
In the safety chip of the TV gateway；The safety chip of the TV gateway is verified for verifying the legitimacy of terminal certificate
After terminal certificate passes through, the public key encryption content key in using terminal certificate obtains encrypted content key, described will add
The content key of close mistake returns to the gateway service module of the TV gateway；The gateway service module of the TV gateway is used
In network module, the terminal through the TV gateway network module to the medium process module of the terminal return described in
Encrypted content key.
Preferably, the safety chip of the TV gateway and the safety chip of the terminal respectively include condition receiving
Block, digital rights management module, descrambler, scrambler, secure storage, randomizer, enciphering and deciphering algorithm and secure clock.
Preferably, pass through between the digital TV receiver module of the TV gateway and the safety chip of the TV gateway
The connection of TS interface.
Preferably, it is connected between the safety chip of the TV gateway and the master chip of TV gateway by USB interface.
Preferably, between the safety chip of the TV gateway and the master chip of TV gateway by I2C or SPI or
The connection of LocalBus interface.
Preferably, it is connected between the safety chip of the terminal and the master chip of terminal by TS interface.
Preferably, pass through I2C or SPI or LocalBus between the safety chip of the terminal and the master chip of terminal
Interface connection.
Preferably, in the secure storage for the safety chip that the certificate and private key of the terminal are stored in the terminal.
According to the third aspect of the invention we, a kind of TV gateway is provided, the TV gateway includes Digital TV Receiving
Module, safety chip, gateway service module and network module；
The digital TV receiver module completes demodulation, obtains DTV code for receiving digital television radio-frequency signal
Stream；
The safety chip descrambles digital television code stream after authorizing successfully for obtaining condition reception authorization；Then it produces
Raw content key, descrambles digital television code stream out using content key encryption；
The gateway service module will be described for reading encrypted digital television code stream from the safety chip
Encrypted digital television code stream is transmitted to the network module；
The network module, for the encrypted digital television code stream to be forwarded to terminal；
And
The network module is also used to receive the request to content key of terminal transmission, includes terminal in the request
Certificate；
The gateway service module, be also used to by terminal certificate be arranged into the safety chip；
The safety chip is also used to verify the legitimacy of terminal certificate, after verification terminal certificate passes through, using terminal card
Public key encryption content key in book obtains encrypted content key, and the encrypted content key is returned to the net
Close service module；
The gateway service module is also used to the encrypted content key returning to the gateway module；
The network module is also used to return to the encrypted content key to terminal.
Preferably, the gateway service module is integrated in the master chip of TV gateway.
Preferably, the safety chip includes Conditional Access Module, digital rights management module, descrambler, scrambler, peace
Full storage, randomizer, enciphering and deciphering algorithm and secure clock.
Preferably, connected between the digital TV receiver module and the safety chip of the TV gateway by TS interface
It connects.
Preferably, it is connected between the safety chip and the master chip of TV gateway by USB interface.
Preferably, it is connect between the safety chip and the master chip of TV gateway by I2C or SPI or LocalBus
Mouth connection.
According to the fourth aspect of the invention, a kind of terminal is provided, the terminal includes network module, media handling mould
Block and safety chip:
The medium process module, for receiving encrypted digital television code stream from terminal by the network module；
And the content key of the public key encryption by the network module into TV gateway request using terminal certificate；And
The content key that public key encryption in the encrypted digital television code stream and using terminal certificate that receive is crossed is sent to institute
State safety chip；
The safety chip, for decrypting content key using the terminal secret key stored in the safety chip, then
The encrypted digital television code stream is decrypted using content key.
Preferably, the safety chip is also used to for the digital television code stream after decryption being sent to the master chip of terminal；Institute
The master chip for stating terminal is also used to demultiplex the digital television code stream after the decryption, export after decoding process.
Preferably, the medium process module is integrated in the master chip of terminal.
Preferably, the safety chip includes Conditional Access Module, digital rights management module, descrambler, scrambler, peace
Full storage, randomizer, enciphering and deciphering algorithm and secure clock.
Preferably, it is connected between the safety chip of the terminal and the master chip of terminal by TS interface.
Preferably, pass through I2C or SPI or LocalBus between the safety chip of the terminal and the master chip of terminal
Interface connection.
Preferably, the certificate and private key of the terminal are stored in the secure storage of the safety chip.
The DRM implementation method of DTV of the invention, the DRM of DTV realize system, TV gateway and end
End, TV gateway complete condition reception by the safety chip of itself, generate content key and encrypt to digital television code stream,
And content key is encrypted using the public key of terminal, terminal is internal using the private key of itself using the safety chip of itself
Hold key to be decrypted and decrypt digital code stream using content key, to realize digital TV contents from TV
Gateway to terminal safe forwarding capability, the present invention can effectively guarantee TV gateway forwarding digital TV contents safety
Property.
The present invention can effectively guarantee the safety of TV gateway forwarding digital TV contents.The present inventor's hair
It is existing, in the prior art, there are no condition reception and DRM encryption is completed using safety chip on TV gateway, then
Scheme is forwarded using the digital TV contents that safety chip carries out DRM decryption at the terminal.Therefore, the skill of the invention to be realized
Art task or never expect the technical problem to be solved is that those skilled in the art or it is not expected that, therefore this hair
Bright is a kind of new technical solution.
By referring to the drawings to the detailed description of exemplary embodiment of the present invention, other feature of the invention and its
Advantage will become apparent.
Detailed description of the invention
It is combined in the description and the attached drawing for constituting part of specification shows the embodiment of the present invention, and even
With its explanation together principle for explaining the present invention.
Fig. 1 shows the flow chart of the DRM implementation method of DTV according to an embodiment of the present invention；
Fig. 2 shows the block diagrams that the DRM of DTV according to an embodiment of the present invention realizes system, TV gateway, terminal.
Specific embodiment
Carry out the various exemplary embodiments of detailed description of the present invention now with reference to attached drawing.It should also be noted that unless in addition having
Body explanation, the unlimited system of component and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally
The range of invention.
Be to the description only actually of at least one exemplary embodiment below it is illustrative, never as to the present invention
And its application or any restrictions used.
Technology, system known to person of ordinary skill in the relevant and equipment may be not discussed in detail, but suitable
In the case of, the technology, system and equipment should be considered as part of specification.
It is shown here and discuss all examples in, any occurrence should be construed as merely illustratively, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, then in subsequent attached drawing does not need that it is further discussed.
Signified TV gateway in the present invention refers to the electronic equipment that can be realized DTV forwarding capability, specific table
Existing form is, for example, to have smart television, mobile phone, PAD of this function etc..Signified terminal in the present invention is referred to from electricity
View closes the electronic equipment for receiving DTV and capable of decrypting the DTV received, and specific manifestation form is, for example, to have
Smart television, mobile phone, PAD of this function etc..It should be noted that same electronic equipment can both have electricity of the invention
The function that view closes, it may have the function of terminal of the invention, that is, the electronic equipment can sometimes be used as television network
It closes and uses, terminal can also be used as to use sometimes.
<first embodiment>
First embodiment according to the present invention, as shown in Figure 1, 2, the DRM for providing a kind of DTV realize system and side
Method is implemented among the TV gateway 1100 using safety chip and the terminal 1200 using safety chip.
TV gateway 1100 includes digital TV receiver module 1130, safety chip 1140, runs on master chip 1110
Gateway service module 1111 and network module 1120.The safety chip 1140 of TV gateway 1100 includes: Conditional Access Module
1141, digital rights management module 1142, descrambler 1143, scrambler 1144, secure storage 1145, randomizer
1146, enciphering and deciphering algorithm 1147 and secure clock 1148.
Terminal 1200 includes network module 1210, the medium process module 1221 and safety chip for running on master chip 1220
1230.Master chip 1220 further includes hardware demultiplexing module 1222 and hardware decoder 1223.The safety chip of terminal 1200
1230 include: Conditional Access Module 1231, digital rights management module 1232, descrambler 1233, scrambler 1234, secure storage
1235, randomizer 1236, enciphering and deciphering algorithm 1237 and secure clock 1238.
It should be noted that in first embodiment, the safety chip 1140 of TV gateway 1100 and the safety of terminal 1200
Chip 1230 uses similar safety chip, and inside has similar module.In other embodiments, the safety of TV gateway
Chip and the safety chip of terminal can be different safety chip, and the inside has different moulds according to respective functional requirement
Block.
The system of first embodiment according to the present invention includes the following steps:
S1: digital television signal receiving step: the digital TV receiver module 1130 of TV gateway 1100 receives digital electricity
Depending on radiofrequency signal, demodulation is completed, digital television code stream is obtained；
S2: digital television code stream descrambling step: the safety chip 1140 of TV gateway 1100 obtains condition reception authorization, after
And after authorizing successfully, descramble digital television code stream；
S3: digital television code stream encrypting step: the safety chip 1140 of TV gateway 1100 generates encrypted content key, after
And digital television code stream out is descrambled using content key encryption；
S4: digital television code stream forwards step: the gateway service module run on the master chip 1110 of TV gateway 1100
1111 read encrypted digital television code stream from the safety chip 1140 of TV gateway 1100, through on TV gateway 1100
Network module 1120 is forwarded to the network module 1210 of terminal 1200, and the network module 1210 of terminal 1200 receives DTV code
The medium process module 1221 being sent to after stream on the master chip 1220 of terminal 1200；
S5: content key obtaining step: the medium process module 1221 on the master chip 1220 of terminal 1200, through terminal
Gateway service module of the network module 1120 on TV gateway 1100 on 1200 network module 1210, TV gateway 1100
1111 request content keys, include the terminal certificate of terminal 1200 in the request, include the public key of terminal 1200 in terminal certificate；
After gateway service module 1111 on TV gateway 1100 receives the request of the terminal certificate comprising terminal 1200, terminal is demonstrate,proved
The legitimacy for verifying terminal certificate is arranged into safety chip 1140 in book；After the verification terminal certificate of safety chip 1140 passes through, make
Encrypted content key is obtained with the public key encryption content key in terminal certificate, returns to the gateway on TV gateway 1100
Service module 1111 then successively returns to the network module of network module 1120 on TV gateway 1100, terminal 1200
1210, the medium process module 1221 on 1200 master chip 1220 of terminal；
S6: digital television code stream decryption step: the medium process module 1221 on the master chip 1220 of terminal 1200 will connect
The encrypted digital television code stream and encrypted content key that receive are sent to the safety chip 1230 of terminal 1200, terminal
1200 safety chip 1230 is decrypted in encrypted content key obtains using the terminal secret key stored in safety chip 1230
Hold key, obtains digital television code stream using the encrypted digital television code stream of content key decryption；
S7: digital television code stream plays step: digital television code stream is sent to end by the safety chip 1230 of terminal 1200
Hardware demultiplexing module 1222 in the master chip 1220 at end 1200 is demultiplexed, and the solution of hardware decoder 1223 is then sent to
Code output.
Wherein, in digital television code stream descrambling step, 1140 use condition of safety chip of TV gateway 1100 receives mould
Block 1141 filters the condition reception Entitlement Management Message in digital television code stream and obtains program authorization, authorizes required safety time
It is provided by the secure clock module 1148 of safety chip 1140.
Wherein, in digital television code stream descrambling step, digital television code stream descrambles the safety chip by TV gateway 1100
1140 descrambler 1143 is completed.
Wherein, in digital television code stream encrypting step, content key by TV gateway 1100 safety chip 1140 with
Machine number generator 1146 generates.
Wherein, in digital television code stream encrypting step, digital television code stream encrypts the safety chip by TV gateway 1100
1140 scrambler 1144 is completed.
Wherein, in content key obtaining step, the certificate and private key of terminal 1200 are stored in the safety of safety chip 1230
In storage 1235.
Wherein, in content key obtaining step, 1140 lieutenant colonel of safety chip on TV gateway 1100 verifies book legitimacy
It is completed by digital rights management module 1142.
Wherein, in digital television code stream decryption step, it is in safety that 1200 decrypted content keys of terminal, which obtain content key,
The digital rights management module 1232 of chip 1230 is completed.
Wherein, digital television code stream decryption step, it is in safety chip 1230 that terminal 1200, which decrypts digital television code stream,
1233 complete in descrambler.
Wherein, the digital TV receiver module 1130 of TV gateway 1100 includes tuner and demodulator, demodulator and peace
It is connected between full chip 1140 using TS interface.
Wherein, pass through USB between the safety chip 1140 of TV gateway 1100 and the master chip 1110 of TV gateway 1100
Interface connection, is mainly used for transmitting digital TV code stream.
Wherein, can also lead between the safety chip 1140 of TV gateway 1100 and the master chip 1110 of TV gateway 1100
I2C or the connection of SPI LocalBus interface are crossed, transmission control information is mainly used for.
Wherein, the master chip 1220 of terminal 1200 is connected with the safety chip 1230 of terminal 1200 using TS interface, mainly
It is used for transmission digital television code stream.
Wherein, 1200 master chip 1220 of terminal and the safety chip 1230 of terminal 1200 using I2C or SPI or
The connection of LocalBus interface is mainly used for transmission control information.
The invention discloses a kind of DRM of DTV to realize system, including using the TV gateway of safety chip and making
With the terminal of safety chip, TV gateway includes digital TV receiver module, safety chip, gateway service module and network
Module, terminal include network module, medium process module and safety chip, in which:
The digital TV receiver module of TV gateway completes demodulation, obtains number for receiving digital television radio-frequency signal
TV code flow；
The safety chip of TV gateway descrambles digital television code stream after authorizing successfully for obtaining condition reception authorization；
Then content key is generated, descrambles digital television code stream out using content key encryption；
The gateway service module of TV gateway, for reading encrypted DTV from the safety chip of TV gateway
Encrypted digital television code stream is transmitted to the network module of TV gateway by code stream；
The network module of TV gateway, for encrypted digital television code stream to be forwarded to the network module of terminal；
The network module of terminal, the encrypted digital television code stream that the network module for receiving TV gateway forwards,
Encrypted digital television code stream is transmitted to the medium process module of terminal；
The medium process module of terminal, for the public affairs in the gateway service module request using terminal certificate to TV gateway
The encrypted content key of key, and the encrypted digital television code stream received and encrypted content key are sent to
The safety chip of terminal；
The safety chip of terminal, the terminal secret key for storing in the safety chip of using terminal decrypt encrypted content
Key is then decrypted encrypted digital television code stream using content key with obtaining content key.
Wherein, the safety chip of terminal is also used to for the digital television code stream after decryption being sent to the master chip of terminal；Eventually
The master chip at end is also used to demultiplex the digital television code stream after decryption, export after decoding process.
Wherein, the gateway service module of TV gateway can integrate in the master chip of TV gateway, at the media of terminal
Reason module can integrate in the master chip of terminal.Certainly, in other embodiments, the gateway service module of TV gateway can
To be an independent module, the medium process module of terminal is also possible to an independent module.The safe core of TV gateway
Master chip of the piece independently of TV gateway, the master chip of the safety chip of terminal independently of terminal.
Wherein, about the medium process module of terminal into the gateway service module request using terminal certificate of TV gateway
Public key encryption content key, and the process of the safety chip for the terminal that encrypted content key is sent to, at one
It can be refined in preferred embodiment are as follows:
The medium process module of terminal, the network module for network module, TV gateway through terminal is to TV gateway
Gateway service module request content key, include the certificate of terminal in request；
Terminal certificate is arranged after receiving the request comprising terminal certificate for the gateway service module of TV gateway
Into the safety chip of TV gateway；
The safety chip of TV gateway uses end for verifying the legitimacy of terminal certificate after verification terminal certificate passes through
Public key encryption content key in the certificate of end obtains encrypted content key, and encrypted content key is returned to television network
The gateway service module of pass；
The gateway service module of TV gateway, the network module for network module, terminal through TV gateway is to terminal
Medium process module return to encrypted content key.
The invention also discloses a kind of TV gateway, TV gateway includes digital TV receiver module, safety chip, gateway
Service module and network module；
Digital TV receiver module completes demodulation, obtains digital television code stream for receiving digital television radio-frequency signal；
Safety chip descrambles digital television code stream after authorizing successfully for obtaining condition reception authorization；Then in generating
Hold key, descrambles digital television code stream out using content key encryption；
Gateway service module, for reading encrypted digital television code stream from safety chip, by encrypted number
TV code flow is transmitted to network module；
Network module, for encrypted digital television code stream to be forwarded to terminal；
And
Network module is also used to receive the request to content key of terminal transmission, includes terminal certificate in request；
Gateway service module, be also used to by terminal certificate be arranged into safety chip；
Safety chip is also used to verify the legitimacy of terminal certificate, after verification terminal certificate passes through, in using terminal certificate
Public key encryption content key obtain encrypted content key, encrypted content key is returned into gateway service module；
Gateway service module is also used to encrypted content key returning to gateway module；
Network module is also used to return to encrypted content key to terminal.
The invention also discloses a kind of terminals: terminal includes network module, medium process module and safety chip:
Medium process module, for receiving encrypted digital television code stream from terminal by network module；And pass through
The content key of public key encryption of the network module into TV gateway request using terminal certificate；And it is encrypted by what is received
Digital television code stream and using terminal certificate in the content key crossed of public key encryption be sent to safety chip；
Safety chip then uses content for decrypting content key using the terminal secret key stored in safety chip
The digital television code stream that key pair encryption is crossed is decrypted.
Safety chip is also used to for the digital television code stream after decryption being sent to the master chip of terminal；The master chip of terminal,
It is also used to demultiplex the digital television code stream after decryption, be exported after decoding process.
Thus embodiment according to the present invention describes the DRM implementation method of DTV of the invention, number electricity
Depending on DRM realize system, TV gateway and terminal, TV gateway is completed condition reception by the safety chip of itself, is generated
Content key encrypts digital television code stream, and is encrypted using the public key of terminal to content key, and terminal uses
The safety chip of itself is decrypted content key using the private key of itself and is carried out using content key to digital code stream
Decryption, to realize safe forwarding capability of the digital TV contents from TV gateway to terminal, the present invention can be protected effectively
Demonstrate,prove the safety of TV gateway forwarding digital TV contents.
It will be appreciated by those skilled in the art that said units or module can be realized by various modes, for example, can
To realize that screen creation module, environmental model parse loading module, matching module and 3D video display by instruction configuration processor
Processing module.Above-mentioned modules can be independent of each other unit, be also possible to merge realization,
The present invention can be system, method and/or computer program product.Computer program product may include computer
Readable storage medium storing program for executing, containing for making processor realize the computer-readable program instructions of various aspects of the invention.With
In execute operation of the present invention computer program instructions can be assembly instruction, instruction set architecture (ISA) instruction, machine instruction,
Machine-dependent instructions, microcode, firmware instructions, condition setup data or with any combination of one or more programming languages
The source code or object code write, programming language include programming language-Smalltalk, C++ of object-oriented etc., with
And conventional procedural programming languages-such as " C " language or similar programming language.Computer-readable program instructions can be complete
It executes, partly executed on the user computer on the user computer entirely, being executed as an independent software package, part
Part executes on the remote computer or executes on a remote computer or server completely on the user computer.
Referring herein to according to the method for the embodiment of the present invention, the flow chart of device (system) and computer program product and/
Or block diagram describes various aspects of the invention.It should be appreciated that flowchart and or block diagram each box and flow chart and/
Or in block diagram each box combination, can be realized by computer-readable program instructions.
The flow chart and block diagram in the drawings show the system of multiple embodiments according to the present invention, method and computer journeys
The architecture, function and operation in the cards of sequence product.In this regard, each box in flowchart or block diagram can generation
One module of table, program segment or a part of instruction, module, program segment or a part of instruction include one or more for real
The executable instruction of logic function as defined in existing.In some implementations as replacements, function marked in the box can also be with
Occur in a different order than that indicated in the drawings.For example, two continuous boxes can actually be basically executed in parallel, it
Can also execute in the opposite order sometimes, this depends on the function involved.It is also noted that block diagram and/or process
The combination of each box in figure and the box in block diagram and or flow chart, can as defined in executing function or movement
Dedicated hardware based system is realized, or can be realized using a combination of dedicated hardware and computer instructions.For this
It is well known that, realized by hardware mode for the technical staff of field, software and hardware is realized and passed through by software mode
In conjunction with mode realize it is all of equal value.
Various embodiments of the present invention are described above, above description is exemplary, and non-exclusive, and
It is not limited to disclosed each embodiment.Without departing from the scope and spirit of illustrated each embodiment, for this skill
Many modifications and changes are obvious for the those of ordinary skill in art field.The selection of term used herein, purport
In principle, the practical application or to the technological improvement in market for best explaining each embodiment, or make the art its
Its those of ordinary skill can understand each embodiment disclosed herein.The scope of the present invention is defined by the appended claims.
Claims (21)
1. a kind of DRM implementation method of DTV, which is characterized in that be implemented on the TV gateway using safety chip and use
Among the terminal of safety chip, the TV gateway include digital TV receiver module, safety chip, gateway service module, with
And network module, the terminal include network module, medium process module and safety chip, which comprises
Digital television signal receiving step, for receiving digital television radio-frequency by the digital TV receiver module of the TV gateway
Signal completes demodulation, obtains digital television code stream；
Digital television code stream descrambling step is being authorized for obtaining condition reception authorization by the safety chip of the TV gateway
Digital television code stream is descrambled after success；
Digital television code stream encrypting step, it is close using content for generating content key by the safety chip of the TV gateway
Key encryption descrambles digital television code stream out；
Digital television code stream forwards step, for the gateway service module by the TV gateway from the safety of the TV gateway
Encrypted digital television code stream is read in chip, the network module through the TV gateway is forwarded to the network mould of the terminal
Block, the network module of the terminal receive the media handling that the terminal is sent to after the encrypted digital television code stream
Module；
Content key obtaining step, for the medium process module by the terminal, network module, the electricity through the terminal
The network module that view closes includes the end in the request to the gateway service module request content key of the TV gateway
The certificate at end；After the gateway service module of the TV gateway receives the request comprising terminal certificate, terminal certificate is arranged
The legitimacy of terminal certificate is verified into the safety chip of the TV gateway；The safety chip of the TV gateway verifies terminal
After certificate passes through, the public key encryption content key in using terminal certificate obtains encrypted content key；The TV gateway
Safety chip the encrypted content key is returned to the gateway service module of the TV gateway, then successively return
To the network module of the TV gateway, the network module of the terminal, the terminal medium process module；
Digital television code stream decryption step, the encrypted number electricity that will be received for the medium process module by the terminal
The safety chip of the terminal is sent to depending on code stream and encrypted content key, the safety chip of the terminal uses the end
The terminal secret key stored in the safety chip at end decrypts encrypted content key to obtain content key, then uses content close
The encrypted digital television code stream is decrypted in key；Wherein, the certificate and private key of the terminal are stored in the terminal
Safety chip secure storage in.
2. the method according to claim 1, wherein the method also includes digital television code stream play step,
Digital television code stream after decryption is sent to the hardware demultiplexing module of the terminal for the safety chip by the terminal
It is demultiplexed, then by the hardware decoder decoded output of the terminal.
3. the method according to claim 1, wherein the gateway service module of the TV gateway runs on TV
In the master chip of gateway, the medium process module of the terminal is run in the master chip of terminal.
4. the method according to claim 1, wherein in the digital television code stream descrambling step, by described
Condition reception Entitlement Management Message in the Conditional Access Module filtering digital television code stream of the safety chip of TV gateway is to obtain
Take authorization.
5. according to the method described in claim 4, it is characterized in that, safety time needed for the authorization is by the TV gateway
Safety chip secure clock module provide.
6. the method according to claim 1, wherein in the digital television code stream descrambling step, by described
The descrambler of the safety chip of TV gateway completes the descrambling to digital television code stream.
7. described the method according to claim 1, wherein in the digital television code stream encrypting step
Content key is generated by the randomizer of the safety chip of the TV gateway.
8. the method according to claim 1, wherein in the digital television code stream encrypting step, by described
The scrambler of the safety chip of TV gateway descrambles digital television code stream out using content key encryption.
9. the method according to claim 1, wherein in the content key obtaining step, the television network
The legitimacy of the safety chip verification terminal certificate of pass is by the digital rights management module of the safety chip of the TV gateway
It completes.
10. the method according to claim 1, wherein in the digital television code stream decryption step, to encryption
The content key crossed, which is decrypted, to be completed by the digital rights management module of the safety chip of the terminal.
11. the method according to claim 1, wherein in the digital television code stream decryption step, to encryption
The digital television code stream crossed, which is decrypted, to be completed by the descrambler of the safety chip of the terminal.
12. a kind of DRM of DTV realizes system, which is characterized in that including using the TV gateway of safety chip and using
The terminal of safety chip, the TV gateway include digital TV receiver module, safety chip, gateway service module and net
Network module, the terminal include network module, medium process module and safety chip, in which:
The digital TV receiver module of the TV gateway completes demodulation, obtains number for receiving digital television radio-frequency signal
TV code flow；
The safety chip of the TV gateway descrambles digital television code stream after authorizing successfully for obtaining condition reception authorization；
Then content key is generated, descrambles digital television code stream out using content key encryption；
The gateway service module of the TV gateway, for reading encrypted number from the safety chip of the TV gateway
The encrypted digital television code stream is transmitted to the network module of the TV gateway by TV code flow；
The network module of the TV gateway, for the encrypted digital television code stream to be forwarded to the network of the terminal
Module；
The network module of the terminal, the encrypted number electricity that the network module for receiving the TV gateway forwards
Depending on code stream, the encrypted digital television code stream is transmitted to the medium process module of the terminal；
The medium process module of the terminal, in the gateway service module request using terminal certificate to the TV gateway
The content key crossed of public key encryption, and the encrypted digital television code stream received and encrypted content key are sent
To the safety chip of the terminal；
The safety chip of the terminal, the terminal secret key for storing in the safety chip using the terminal are decrypted encrypted
Content key is then decrypted the encrypted digital television code stream using content key with obtaining content key；Its
In, the certificate and private key of the terminal are stored in the secure storage of the safety chip of the terminal.
13. system according to claim 12, which is characterized in that the safety chip of the terminal, after being also used to decrypt
Digital television code stream be sent to the master chip of terminal；The master chip of the terminal is also used to the number electricity after the decryption
It demultiplexed depending on code stream, exported after decoding process.
14. system according to claim 12, which is characterized in that the gateway service module of the TV gateway is integrated in electricity
In the master chip that view closes, the medium process module of the terminal is integrated in the master chip of terminal.
15. system according to claim 12, which is characterized in that
The medium process module of the terminal, for network module, the TV gateway through the terminal network module to
The gateway service module request content key of the TV gateway includes the certificate of the terminal in the request；
Terminal certificate is arranged after receiving the request comprising terminal certificate for the gateway service module of the TV gateway
Into the safety chip of the TV gateway；
The safety chip of the TV gateway uses end for verifying the legitimacy of terminal certificate after verification terminal certificate passes through
Public key encryption content key in the certificate of end obtains encrypted content key, and the encrypted content key is returned to institute
State the gateway service module of TV gateway；
The gateway service module of the TV gateway, the network mould for network module, the terminal through the TV gateway
Block returns to the encrypted content key to the medium process module of the terminal.
16. system according to claim 12, which is characterized in that the safety chip of the TV gateway and the terminal
Safety chip respectively includes Conditional Access Module, digital rights management module, descrambler, scrambler, secure storage, random number hair
Raw device, enciphering and deciphering algorithm and secure clock.
17. system according to claim 12, which is characterized in that the digital TV receiver module of the TV gateway and institute
It states and is connected between the safety chip of TV gateway by TS interface.
18. system according to claim 12, which is characterized in that the safety chip of the TV gateway and TV gateway
It is connected between master chip by USB interface.
19. system according to claim 12, which is characterized in that the safety chip of the TV gateway and TV gateway
It is connected between master chip by I2C or SPI LocalBus interface.
20. system according to claim 12, which is characterized in that the safety chip of the terminal and the master chip of terminal it
Between connected by TS interface.
21. system according to claim 12, which is characterized in that the safety chip of the terminal and the master chip of terminal it
Between connected by I2C or SPI LocalBus interface.
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| CN108012188A (en) * | 2016-10-28 | 2018-05-08 | 中国电信股份有限公司 | The safe playback method of encrypted video and system, set-top box and DRM platform |
| CN106384040A (en) * | 2016-11-14 | 2017-02-08 | 广东美的制冷设备有限公司 | Intelligent module and intelligent household appliance |
| CN108075877B (en) * | 2016-11-15 | 2022-04-29 | 华为技术有限公司 | Safety system and terminal chip |
| CN115659287B (en) * | 2022-11-01 | 2023-11-10 | 寰宇信任(北京)技术有限公司 | Network copyright consumption management system |
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Address after: 110011 No. 2, Zhongjie Road, Shenhe District, Shenyang City, Liaoning Province Patentee after: China Radio and television Liaoning Network Co.,Ltd. Patentee after: Beijing Digital Taihe Technology Co., Ltd Address before: 110011 No. 2, Zhongjie Road, Shenhe District, Shenyang City, Liaoning Province Patentee before: NORTHERN UNITED RADIO AND TV NETWORK CO.,LTD. Patentee before: Beijing Digital Taihe Technology Co., Ltd |
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