CN104363481A - Multi-encryption conditional access system based on broadcast television gateway system - Google Patents
Multi-encryption conditional access system based on broadcast television gateway system Download PDFInfo
- Publication number
- CN104363481A CN104363481A CN201410595454.8A CN201410595454A CN104363481A CN 104363481 A CN104363481 A CN 104363481A CN 201410595454 A CN201410595454 A CN 201410595454A CN 104363481 A CN104363481 A CN 104363481A
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- China
- Prior art keywords
- terminal
- decipher
- control
- authorization key
- scrambler
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- 238000013475 authorization Methods 0.000 claims abstract description 66
- 230000005236 sound signal Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 17
- 230000005540 biological transmission Effects 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 4
- 230000002596 correlated effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Classifications
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- 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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
- H04N21/26613—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel for generating or managing keys in general
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- 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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
- H04N21/2389—Multiplex stream processing, e.g. multiplex stream encrypting
- H04N21/23895—Multiplex stream processing, e.g. multiplex stream encrypting involving multiplex stream encryption
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- 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
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
- H04N21/4385—Multiplex stream processing, e.g. multiplex stream decrypting
- H04N21/43853—Multiplex stream processing, e.g. multiplex stream decrypting involving multiplex 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
- H04N21/45—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
- H04N21/4623—Processing of entitlement messages, e.g. ECM [Entitlement Control Message] or EMM [Entitlement Management Message]
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Databases & Information Systems (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computer Security & Cryptography (AREA)
- Theoretical Computer Science (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses a multi-encryption conditional access system based on a broadcast television gateway system. The multi-encryption conditional access system based on the broadcast television gateway system comprises a multiplexer, a scrambler, a descrambler, a demultiplexer, a control encryption device, an authorization secret key encryption device, a control decryption device, an authorization secret key decryption device, a user authorization terminal and a user management terminal, wherein the control encryption device, the multiplexer and the demultiplexer are sequentially connected to one another; the control encryption device is also connected with the scrambler, the authorization secret key encryption device and the user authorization terminal; the scrambler is also connected with the multiplexer; the authorization secret key encryption device is also connected with the user authorization terminal; the user authorization terminal is connected with the user management terminal; the user management terminal is also connected with the authorization secret key decryption device; and the demultiplexer is connected with the scrambler, the control decryption device and the authorization secret key decryption device. By the principle, multi-encryption is performed on transmitting signals by a mechanism; and the transmitting signals cannot be easily cracked by lawless persons, and are transmitted safely.
Description
Technical field
The present invention relates to condition reception field, be specifically related to the multi-enciphering condition receiving system based on broadcasting and TV gateway system.
Background technology
Along with digital television techniques implementing in full in field of broadcast televisions, subscription programs, pay-per-view PayPerView, PPV instant pay-per-view Impulse PayPerView, the charge operation such as IPPV, interactive television, requires that radio and television operator can control the access of user to program.In addition, in the multimedia communication such as video request program Video2On2Demand, VOD, Web TV, video conference application, condition receiving system carries out one of method of digital copyright protecting to the distribution of content of multimedia.Condition receiving system is the core technology of carrying out pay TV, understands and improve its operating mechanism, and the success of operation and maintenance to paying television services grasping it is carried out and seemed extremely important.Condition receiving system of today has only carried out the cryptographic operation of single, is easy to be cracked by lawless person, the fail safe of influential system transmission.
Summary of the invention
Instant invention overcomes the deficiencies in the prior art, provide the multi-enciphering condition receiving system based on broadcasting and TV gateway system, this mechanism carries out multi-enciphering to signal transmission, is not easily cracked by lawless person, transmits safer.
For solving above-mentioned technical problem, the present invention is by the following technical solutions: based on the multi-enciphering condition receiving system of broadcasting and TV gateway system, comprise multiplexer, scrambler, descrambler, demodulation multiplexer, control encryption equipment, authorization key encryption equipment, control decipher, authorization key decipher, subscriber authorisation terminal and user management terminal, described control encryption equipment, multiplexer is connected successively with demodulation multiplexer, control encryption equipment also connects scrambler, authorization key encryption equipment and subscriber authorisation terminal, scrambler is wherein connection multiplexing device also, authorization key encryption equipment also connects subscriber authorisation terminal, described subscriber authorisation terminal connects user management terminal, and user management terminal also connects authorization key decipher, described demodulation multiplexer connects descrambler simultaneously, controls decipher and authorization key decipher.
That is correlated with in transmitting procedure has two data flow, Entitlement Control Message ECM and Entitlement Management Message EMM, and the former, by controlling encryption equipment encryption, also comprises the programme informations such as programming source, time, classifying content and program price in the information after encryption; The latter is encrypted by authorization key encryption equipment, comprises address, license fee etc. that authorized user message, the program can seen as user or time period, user pay.Subscriber authorisation terminal is also set in this mechanism simultaneously, could transmit after needing mandate, and between authorization key decipher and user management terminal, need the private key ability control and management utilizing user, carry out multiple-protection to this mechanism, not easily cracked by lawless person, transmit safer.
User management terminal is in charge of user profile, and the program order of process user, sends bill to user, and give an order to subscriber authorisation terminal, determines which user can be authorized to use broadcast television service.Scrambler is then send authorized user to safely again after the secret key encryption by descrambling.Descrambler is then the inverse process of encryption equipment.Subscriber authorisation terminal accepts the order of Subscriber Management System, for authorized user generates authorization message.
Connection control word generator is gone back between described subscriber authorisation terminal and scrambler.Need first to carry out scrambling process before program broadcasts, scrambling processes the transmission class after multiplexing and a pseudorandom scrambling sequence is done mould 2 add, and the control word that the generation of this pseudo random sequence is provided by control word generator is determined, increase the difficulty that this mechanism is decoded by lawless person.
Described descrambler is connection control decipher also.
Described authorization key decipher connection control decipher.
Described multiplexer receives the vision signal, audio signal and the data message that pass over from outside.
Compared with prior art, the invention has the beneficial effects as follows:
1, multiple different cryptographic operations such as controlling encryption equipment, authorization key encryption equipment, subscriber authorisation terminal is set in the present invention, avoid that coded signal is too single is easily decoded by lawless person, act between authorization key decipher and user management terminal in addition and also need connection work could improve the fail safe of Signal transmissions further by private key for user.
2, connection control word generator is gone back between subscriber authorisation terminal and scrambler, need first to carry out scrambling process before program broadcasts, scrambling processes the transmission class after multiplexing and a pseudorandom scrambling sequence is done mould 2 add, and the control word that the generation of this pseudo random sequence is provided by control word generator is determined, increase the difficulty that this mechanism is decoded by lawless person.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further elaborated, and embodiments of the invention are not limited thereto.
Embodiment 1:
As shown in Figure 1, the present invention includes multiplexer, scrambler, descrambler, demodulation multiplexer, control encryption equipment, authorization key encryption equipment, control decipher, authorization key decipher, subscriber authorisation terminal and user management terminal, described control encryption equipment, multiplexer are connected successively with demodulation multiplexer, control encryption equipment also connects scrambler, authorization key encryption equipment and subscriber authorisation terminal, scrambler is wherein connection multiplexing device also, and authorization key encryption equipment also connects subscriber authorisation terminal; Described subscriber authorisation terminal connects user management terminal, and user management terminal also connects authorization key decipher; Described demodulation multiplexer connects descrambler simultaneously, controls decipher and authorization key decipher.
That is correlated with in transmitting procedure has two data flow, Entitlement Control Message ECM and Entitlement Management Message EMM, and the former, by controlling encryption equipment encryption, also comprises the programme informations such as programming source, time, classifying content and program price in the information after encryption; The latter is encrypted by authorization key encryption equipment, comprises address, license fee etc. that authorized user message, the program can seen as user or time period, user pay.Subscriber authorisation terminal is also set in this mechanism simultaneously, could transmit after needing mandate, and between authorization key decipher and user management terminal, need the private key ability control and management utilizing user, carry out multiple-protection to this mechanism, not easily cracked by lawless person, transmit safer.
User management terminal is in charge of user profile, and the program order of process user, sends bill to user, and give an order to subscriber authorisation terminal, determines which user can be authorized to use broadcast television service.Scrambler is then send authorized user to safely again after the secret key encryption by descrambling.Descrambler is then the inverse process of encryption equipment.Subscriber authorisation terminal accepts the order of Subscriber Management System, for authorized user generates authorization message.
Embodiment 2:
The present embodiment preferred concrete structure on the basis of embodiment 1 is as follows: go back connection control word generator between described subscriber authorisation terminal and scrambler.Need first to carry out scrambling process before program broadcasts, scrambling processes the transmission class after multiplexing and a pseudorandom scrambling sequence is done mould 2 add, and the control word that the generation of this pseudo random sequence is provided by control word generator is determined, increase the difficulty that this mechanism is decoded by lawless person.
Described descrambler is connection control decipher also.
Described authorization key decipher connection control decipher.
Described multiplexer receives the vision signal, audio signal and the data message that pass over from outside.
Its operation principle be program before play-out, will through the scrambling process of scrambler, scrambling processes the transmission class after multiplexing and a pseudorandom scrambling sequence is done mould 2 add, and the control word that the generation of this pseudo random sequence is provided by control word generator is called for short CW and determines.In the transport stream, transmit to control word and relevant have two data flow: Entitlement Control Message ECM and Entitlement Management Message EMM.Transmitted in ECM by the control word after controlling encryption equipment process, wherein also comprise the programme informations such as programming source, time, classifying content and program price.EMM information is transmitted in Entitlement Management Message to authorization key encryption equipment, and the information in authorization key encryption equipment to distribute the encryption of key before transmission through individual subscriber, then pass to multiplexer.Wherein also comprise address in EMM, license fee etc. that authorized user message, the program can seen as user or time period, user pay.At user side, in order to regenerate descrambling random sequence, relevant condition reception control information must be obtained.By demodulation multiplexer, demultiplexing is carried out to multiplexer transmission encrypting information, then ECM information is wherein deciphered by control word, EMM information is deciphered by authorization key, user management terminal is managed authorization key decipher by private key for user, thus the original video of decoding place, audio frequency and data message.
Just this invention can be realized as mentioned above.
Claims (5)
1. based on the multi-enciphering condition receiving system of broadcasting and TV gateway system, it is characterized in that: comprise multiplexer, scrambler, descrambler, demodulation multiplexer, control encryption equipment, authorization key encryption equipment, control decipher, authorization key decipher, subscriber authorisation terminal and user management terminal, described control encryption equipment, multiplexer are connected successively with demodulation multiplexer, control encryption equipment also connects scrambler, authorization key encryption equipment and subscriber authorisation terminal, scrambler is wherein connection multiplexing device also, and authorization key encryption equipment also connects subscriber authorisation terminal; Described subscriber authorisation terminal connects user management terminal, and user management terminal also connects authorization key decipher; Described demodulation multiplexer connects descrambler simultaneously, controls decipher and authorization key decipher.
2. the multi-enciphering condition receiving system based on broadcasting and TV gateway system according to claim 1, is characterized in that: go back connection control word generator between described subscriber authorisation terminal and scrambler.
3. the multi-enciphering condition receiving system based on broadcasting and TV gateway system according to claim 1, is characterized in that: described descrambler is connection control decipher also.
4. the multi-enciphering condition receiving system based on broadcasting and TV gateway system according to claim 1, is characterized in that: described authorization key decipher connection control decipher.
5. the multi-enciphering condition receiving system based on broadcasting and TV gateway system according to claim 1, is characterized in that: described multiplexer receives the vision signal, audio signal and the data message that pass over from outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410595454.8A CN104363481A (en) | 2014-10-30 | 2014-10-30 | Multi-encryption conditional access system based on broadcast television gateway system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410595454.8A CN104363481A (en) | 2014-10-30 | 2014-10-30 | Multi-encryption conditional access system based on broadcast television gateway system |
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| Publication Number | Publication Date |
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| CN104363481A true CN104363481A (en) | 2015-02-18 |
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|---|---|---|---|
| CN201410595454.8A Pending CN104363481A (en) | 2014-10-30 | 2014-10-30 | Multi-encryption conditional access system based on broadcast television gateway system |
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| Country | Link |
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| CN (1) | CN104363481A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109005450A (en) * | 2018-07-16 | 2018-12-14 | 广州辉群智能科技有限公司 | A kind of broadcast controlling method and device of broadcasting equipment |
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Application publication date: 20150218 |
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| RJ01 | Rejection of invention patent application after publication |