CN102769776A - System and method for enabling CAS (Conditional Access System) terminal to timely obtain entitlement - Google Patents
System and method for enabling CAS (Conditional Access System) terminal to timely obtain entitlement Download PDFInfo
- Publication number
- CN102769776A CN102769776A CN2012102681060A CN201210268106A CN102769776A CN 102769776 A CN102769776 A CN 102769776A CN 2012102681060 A CN2012102681060 A CN 2012102681060A CN 201210268106 A CN201210268106 A CN 201210268106A CN 102769776 A CN102769776 A CN 102769776A
- Authority
- CN
- China
- Prior art keywords
- emm
- cas
- terminal
- entitlement
- message
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses a system for enabling a CAS (Conditional Access System) terminal to timely obtain an entitlement, which comprises a scrambling machine, a CA (Certification Authority) server, an EMM (Entitlement Management Message) management server and a CAS terminal, wherein the scrambling machine is used for carrying out two-way communication with the CA server, sending a control word to the CA server and receiving entitlement control information and entitlement management information sent by the CA sever; the CA server is used for carrying out two-way communication with the EMM management server and sending the entitlement management information to the EMM management server; the EMM management server is used for carrying out two-way communication with the CAS terminal, receiving a request of the CAS terminal and sending the entitlement management information to the CAS terminal; and the CAS terminal is used for carrying out one-way communication with the scrambling machine through a broadcasting network, receiving the entitlement control information, the entitlement management information and scrambling data sent by the scrambling machine, and descrambling and broadcasting programs. According to the system, the entitlement information can be obtained by the CAS terminal at any time when the terminal is started, so the rights and interests and excellent experience of users to enjoy a digital television service are guaranteed; artificial entitlement intervention is not needed, the workload of an operator and users is lightened; and the system is convenient to use.
Description
Technical field
The present invention relates to the digital television techniques field, relate in particular to the system and method for in time obtaining the authorization in a kind of CAS of realization terminal.
Background technology
Condition receiving system (Conditional access system; CAS) be the basic means that guarantees digital television business safety; Work such as CAS is responsible for accomplishing the obtaining of subscriber authorisation control and management information, generates, encrypts, transmission and program scheduling control guarantee to have only that authorized users could watch programs.Its basic principle is: the CAS front end system utilizes control word CW that program data is carried out scrambling, and CW is encrypted generation Entitlement Control Message ECM, and simultaneously, the CAS front end system generates different authorisation management information EMM to different users; The CAS terminal receives scrambled program data, ECM and EMM, and deciphering obtains authorization message to the EMM of oneself, utilizes authorization message deciphering ECM to obtain CW, and then also plays with CW descrambling of scrambled program data.
At present, the CAS front end system mainly adopts regular transmission Entitlement Management Message EMM mode that the CAS terminal is authorized, at set intervals; The CAS front end system generates EMM data; In certain cycle, send to the CAS terminal, generated EMM data in per 3 months such as the CAS front end system, and in 10 days, send continuously; Deciphering obtained authorization message after the CAS terminal received EMM, and then can watch scrambled program.But there is certain problem in present this authorization, the CAS front end system send Entitlement Management Message EMM during this period of time in, if the not start of CAS terminal, then the CAS terminal can not receive EMM, can't watch scrambled program.Only if the user sends a telegraph operator, operator resends the EMM data to this CAS terminal, otherwise before the CAS front end system sends Entitlement Management Message EMM next time, scrambled program can't be watched in this CAS terminal.Though can obtain the authorization through sending a telegraph the repeating transmission Entitlement Management Message EMM of operator; But it is all cumbersome concerning user and operator; And can use digital television business to impact to the user in the short time, the image of operator is also had certain influence.In addition, because each user's EMM data are different, when the user was many, the EMM data can take a large amount of broadcast bandwidth, and sending a large amount of EMM data for a long time can affect to program stream.
Summary of the invention
The object of the invention is exactly to exist in time to obtain the authorization and influence the user and use digital television business and operator to be directed against the user to carry out problems such as independent Authorized operation trouble in order to solve present CAS terminal; The system and method for in time obtaining the authorization in a kind of CAS of realization terminal has been proposed; Make the CAS terminal information of can in time obtaining the authorization of starting shooting at any time; Guaranteed that the user enjoys the rights and interests and the good experience of digital television business; Need not carry out manual work and authorize intervention, alleviate operator and user's workload, easy to use.
To achieve these goals, the present invention adopts following technical scheme:
The system that a kind of CAS of realization in time obtains the authorization at the terminal, it comprises:
The scrambling machine with the two-way communication of CA server, sends control word CW and gives the CA server, receives Entitlement Control Message ECM and Entitlement Management Message EMM that the CA server is sent;
The CA server with the two-way communication of EMM management server, sends Entitlement Management Message EMM and gives the EMM management server;
The EMM management server with the two-way communication of CAS terminal, receives the CAS terminal request, sends Entitlement Management Message EMM and gives the CAS terminal;
The CAS terminal with scrambling machine one-way communication, receives Entitlement Control Message ECM, Entitlement Management Message EMM, scrambled data, descrambling and broadcast program that the scrambling machine sends.
Realize the method for in time obtaining the authorization in the CAS terminal based on said system, its step is:
The S1:CA server generates Entitlement Management Message EMM, sends to EMM management server and scrambling machine;
S2: the program stream of scrambling machine after with Entitlement Management Message EMM and Entitlement Control Message ECM, scrambling sends in the radio network in the lump;
The S3:CAS starting terminal is downloaded Entitlement Management Message EMM and is resolved acquisition CAS authorization terminal information from the EMM management server;
The Conditional Access to program is realized according to the authorization message that obtains from the EMM management server in the S4:CAS terminal;
The S5:CAS terminal receives Entitlement Management Message EMM and parsing from radio network, upgrades the authorization message in the CAS terminal, and realizes the Conditional Access to program according to the authorization message after upgrading.
Among the said step S3, the flow process of downloading and resolve Entitlement Management Message EMM from the EMM management server is:
S301: judge whether there is effective authorization message in the CAS terminal,, withdraw from flow process if exist; If there is not execution in step S302;
The S302:CAS terminal is sent the EMM download request and is given the EMM management server;
The S303:EMM management server judges whether the EMM download request is legal, if legal, execution in step S304; If illegal, withdraw from flow process;
The S304:EMM management server sends corresponding EMM data and gives the CAS terminal;
S305:CAS terminal parses EMM data are utilized the authorization message that obtains in the authorization message renewal CAS terminal.
Among the said step S303, judge that the method for EMM download request legitimacy is: said EMM download request comprises CAS Termination ID identifier at least; If there are the EMM data corresponding with CAS Termination ID identifier in the EMM management server, then the EMM download request is legal; Otherwise the EMM download request is illegal.
Said authorization message is to encrypt storage in the CAS terminal.
The invention has the beneficial effects as follows: when the present invention sends Entitlement Management Message EMM through the scrambling machine; EMM is kept at confession CAS terminal downloads on the EMM management server; Solved the CAS terminal and sent the authorization message time because of missing the CAS front end system; And cause the CAS terminal temporarily can't use the problem of digital television business, and need not manual intervention and can realize the CAS terminal information of in time obtaining the authorization, guaranteed that the user enjoys the rights and interests and the good experience of digital television business; Alleviated operator and user's workload, easy to use.In addition, the invention enables the CAS front end system can reduce the time of sending EMM through radio network, avoid a large amount of EMM data to take broadcast bandwidth for a long time, can reduce and send of the influence of EMM data program stream.
Description of drawings
Fig. 1 is a system configuration sketch map according to the invention;
Fig. 2 is the method for the invention flow chart;
Fig. 3 is that the EMM flow chart is downloaded, resolved in the CAS terminal from the EMM management server.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes a part of the present invention, and illustrated embodiment of the present invention and explanation thereof are used to explain the present invention, does not constitute improper qualification of the present invention.
As shown in Figure 1, realize the system that in time obtains the authorization in the CAS terminal, it comprises:
The scrambling machine with the two-way communication of CA server, sends control word CW and gives the CA server, receives Entitlement Control Message ECM and Entitlement Management Message EMM that the CA server is sent;
The CA server with the two-way communication of EMM management server, sends Entitlement Management Message EMM and gives the EMM management server;
The EMM management server with the two-way communication of CAS terminal, receives the CAS terminal request, sends Entitlement Management Message EMM and gives the CAS terminal;
The radio network one-way communication is passed through with the scrambling machine in the CAS terminal, receives Entitlement Control Message ECM, Entitlement Management Message EMM, scrambled data, descrambling and broadcast program that the scrambling machine sends.
As shown in Figure 2, realize the method for in time obtaining the authorization in the CAS terminal, its step is:
The S1:CA server generates Entitlement Management Message EMM, sends to EMM management server and scrambling machine;
S2: the scrambling machine sends to Entitlement Management Message EMM and Entitlement Control Message ECM, program stream in the radio network in the lump;
The S3:CAS starting terminal is downloaded Entitlement Management Message EMM and is resolved acquisition CAS authorization terminal information from the EMM management server;
The Conditional Access to program is realized according to authorization message in the S4:CAS terminal;
The S5:CAS terminal receives Entitlement Management Message EMM and resolves the authorization message in the renewal CAS terminal from radio network.
Said authorization message is to encrypt storage in the CAS terminal.
As shown in Figure 3, the flow process that EMM was downloaded and resolved in the CAS terminal from the EMM management server is:
S301: judge whether there is effective authorization message in the CAS terminal,, withdraw from flow process if exist; If there is not execution in step S302;
The S302:CAS terminal is sent the EMM download request and is given the EMM management server, and said EMM download request comprises the ID identifier at CAS terminal at least;
The S303:EMM management server judges whether the EMM download request legal, if exist in the EMM management server with the EMM download request in the corresponding EMM data of CAS Termination ID identifier, then the EMM download request is legal, execution in step S304; Otherwise the EMM download request is illegal, withdraws from flow process;
The S304:EMM management server sends corresponding EMM data and gives the CAS terminal;
S305:CAS terminal parses EMM data are utilized the authorization message that obtains in the authorization message renewal CAS terminal.
Above-mentioned is preferred embodiment of the present invention, and on the basis of technical scheme of the present invention, various modifications of making or distortion still belong to protection scope of the present invention.
Claims (5)
1. system that realizes in time obtaining the authorization in the CAS terminal is characterized in that it comprises:
The scrambling machine with the two-way communication of CA server, sends control word CW and gives the CA server, and receives Entitlement Control Message ECM and Entitlement Management Message EMM that the CA server is sent;
The CA server with the two-way communication of EMM management server, sends Entitlement Management Message EMM and gives the EMM management server;
The EMM management server with the two-way communication of CAS terminal, receives the CAS terminal request, sends Entitlement Management Message EMM and gives the CAS terminal;
The CAS terminal with scrambling machine one-way communication, receives Entitlement Control Message ECM, Entitlement Management Message EMM and scrambled data that the scrambling machine sends, broadcast program behind the descrambling.
2. realize the method for in time obtaining the authorization in the CAS terminal based on the said system of claim 1 for one kind, it is characterized in that its step is:
The S1:CA server generates Entitlement Management Message EMM, sends to EMM management server and scrambling machine respectively;
S2: the program stream of scrambling machine after with Entitlement Management Message EMM and Entitlement Control Message ECM, scrambling sends in the radio network in the lump;
The S3:CAS starting terminal is downloaded Entitlement Management Message EMM and is resolved acquisition CAS authorization terminal information from the EMM management server;
The Conditional Access to program is realized according to the authorization message that obtains from the EMM management server in the S4:CAS terminal;
The S5:CAS terminal receives Entitlement Management Message EMM and parsing from radio network, upgrades the authorization message in the CAS terminal, and realizes the Conditional Access to program according to the authorization message after upgrading.
3. the method that realization CAS as claimed in claim 2 in time obtains the authorization at the terminal is characterized in that, among the said step S3, the flow process of downloading and resolve Entitlement Management Message EMM from the EMM management server is:
S301: judge whether there is effective authorization message in the CAS terminal,, withdraw from flow process if exist; Otherwise, execution in step S302;
The S302:CAS terminal is sent the EMM download request and is given the EMM management server;
The S303:EMM management server judges whether the EMM download request is legal, if legal, execution in step S304; If illegal, withdraw from flow process;
The S304:EMM management server sends corresponding EMM data and gives the CAS terminal;
S305:CAS terminal parses EMM data are utilized the authorization message that obtains in the authorization message renewal CAS terminal.
4. the method that realization CAS as claimed in claim 3 in time obtains the authorization at the terminal is characterized in that, among the said step S303, judge that the method for EMM download request legitimacy is: said EMM download request comprises CAS Termination ID identifier at least; If there are the EMM data corresponding with CAS Termination ID identifier in the EMM management server, then the EMM download request is legal; Otherwise the EMM download request is illegal.
5. like claim 2 or the 3 described methods that realize in time obtaining the authorization in the CAS terminals, it is characterized in that said authorization message is to encrypt storage in the CAS terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210268106.0A CN102769776B (en) | 2012-07-30 | 2012-07-30 | A kind of CAS of realization terminal obtains the system and method for mandate in time |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210268106.0A CN102769776B (en) | 2012-07-30 | 2012-07-30 | A kind of CAS of realization terminal obtains the system and method for mandate in time |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102769776A true CN102769776A (en) | 2012-11-07 |
| CN102769776B CN102769776B (en) | 2016-09-07 |
Family
ID=47097006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210268106.0A Active CN102769776B (en) | 2012-07-30 | 2012-07-30 | A kind of CAS of realization terminal obtains the system and method for mandate in time |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102769776B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103841439A (en) * | 2014-02-26 | 2014-06-04 | 广西广播电视信息网络股份有限公司 | Method for achieving CA seamless reception of set top box through synchronous output of double scramblers |
| CN104202622A (en) * | 2014-09-23 | 2014-12-10 | 山东泰信电子股份有限公司 | Safe advertisement broadcasting method and system |
| CN109565341A (en) * | 2016-08-11 | 2019-04-02 | 三星电子株式会社 | Method and apparatus for mounting condition access system information |
| CN113727196A (en) * | 2021-07-19 | 2021-11-30 | 深圳市华曦达科技股份有限公司 | Method and device for realizing CAS terminal authorization on demand |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101227586A (en) * | 2007-01-15 | 2008-07-23 | 北京邦天科技有限公司 | Method and system for implementing broadcasting network condition receiving |
| CN101321261A (en) * | 2008-04-25 | 2008-12-10 | 北京创毅视讯科技有限公司 | Front-end system, user terminal and authorization management information distribution method |
| CN101924909A (en) * | 2010-07-20 | 2010-12-22 | 深圳市茁壮网络股份有限公司 | Middleware adaptation layer-based universal digital television conditional access system |
-
2012
- 2012-07-30 CN CN201210268106.0A patent/CN102769776B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101227586A (en) * | 2007-01-15 | 2008-07-23 | 北京邦天科技有限公司 | Method and system for implementing broadcasting network condition receiving |
| CN101321261A (en) * | 2008-04-25 | 2008-12-10 | 北京创毅视讯科技有限公司 | Front-end system, user terminal and authorization management information distribution method |
| CN101924909A (en) * | 2010-07-20 | 2010-12-22 | 深圳市茁壮网络股份有限公司 | Middleware adaptation layer-based universal digital television conditional access system |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103841439A (en) * | 2014-02-26 | 2014-06-04 | 广西广播电视信息网络股份有限公司 | Method for achieving CA seamless reception of set top box through synchronous output of double scramblers |
| CN104202622A (en) * | 2014-09-23 | 2014-12-10 | 山东泰信电子股份有限公司 | Safe advertisement broadcasting method and system |
| CN104202622B (en) * | 2014-09-23 | 2017-11-07 | 山东泰信电子股份有限公司 | A kind of advertisement safe broadcast method and system |
| CN109565341A (en) * | 2016-08-11 | 2019-04-02 | 三星电子株式会社 | Method and apparatus for mounting condition access system information |
| US11019375B2 (en) | 2016-08-11 | 2021-05-25 | Samsung Electronics Co., Ltd. | Method and apparatus for installing conditional access system information |
| CN109565341B (en) * | 2016-08-11 | 2021-08-10 | 三星电子株式会社 | Method and apparatus for installing conditional access system information |
| CN113727196A (en) * | 2021-07-19 | 2021-11-30 | 深圳市华曦达科技股份有限公司 | Method and device for realizing CAS terminal authorization on demand |
| CN113727196B (en) * | 2021-07-19 | 2023-09-15 | 深圳市华曦达科技股份有限公司 | Method, device and storage medium for realizing CAS terminal authorization on demand |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102769776B (en) | 2016-09-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7698568B2 (en) | System and method for using DRM to control conditional access to broadband digital content | |
| KR101762955B1 (en) | A method for controlling access to a plurality of channels by a receiver/decoder | |
| WO2008046323A1 (en) | Mobile telephone television service protect method, system and apparatus | |
| JP2006148896A (en) | System and method for charging individual broadcast channel of terrestrial dmb | |
| CN104854894A (en) | Content url authentication for dash | |
| EP2286588B1 (en) | Unit and method for secure processing of access controlled audio/video data | |
| EP2373019A1 (en) | Secure descrambling of an audio / video data stream | |
| EP1853000A1 (en) | Subscriber authorization method and system, and authorization controlling system and terminal device thereof | |
| US20120008773A1 (en) | Providing control words to a receiver | |
| WO2005045554A2 (en) | System and method for using drm to control conditional access to broadband digital content | |
| CN103024476B (en) | DTV gateway equipment and the method for content safety protection | |
| CN102143129A (en) | Method and system for realizing service protection in hyper text transmission protocol (HTTP) streaming transmission | |
| CN102427561A (en) | Method for preventing VOD (Video-On-Demand) programs from being illegally spread and shared | |
| CN103596050A (en) | Digital television signal reception system and reception method thereof | |
| CN102769776A (en) | System and method for enabling CAS (Conditional Access System) terminal to timely obtain entitlement | |
| CN102714593B (en) | The encryption method of control character, transfer approach and decryption method and the recording medium for performing these methods | |
| CA2706116A1 (en) | Controlling the validity period of a decryption key | |
| CN103647971A (en) | Video transmission based encryption and decryption method and system | |
| CN102665105A (en) | Method for realizing rapid channel change of digital television terminal | |
| CN101742249B (en) | Realization method of trusted bilateral network digital television system | |
| CN100544429C (en) | A kind of mobile phone TV services content protecting method | |
| CN201830399U (en) | Front end and client of conditional access system | |
| CN102761777B (en) | Multiple-CA (conditional access) simulcrypt system and method | |
| CN103780961B (en) | A kind of guard method of data message and equipment | |
| CN101442660B (en) | System for receiving download type digital television condition and dynamic download method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |