CN100364331C - A method for managing cell crossing of subscriber in condition access system - Google Patents
A method for managing cell crossing of subscriber in condition access system Download PDFInfo
- Publication number
- CN100364331C CN100364331C CNB2003101160692A CN200310116069A CN100364331C CN 100364331 C CN100364331 C CN 100364331C CN B2003101160692 A CNB2003101160692 A CN B2003101160692A CN 200310116069 A CN200310116069 A CN 200310116069A CN 100364331 C CN100364331 C CN 100364331C
- Authority
- CN
- China
- Prior art keywords
- user
- gca
- receiving system
- program
- data
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The present invention discloses a method for the trans-cell management of subscribers in conditional reception systems, which comprises: the addresses of subscribers are divided according to areas; subscriber authorization information EMM is transmitted to each subscriber by a conditional reception system; the values of subscriber area addresses are set by authorization; the data of a ca private data list in a PSI list is generated by a front terminal system of a subnetwork; the ca private information is added; when a program is watched, the data of the ca private data list from the PSI list of the subnetwork is received firstly by a module of the conditional reception system on a set top box; the pid value of the EMM is filtered and analyzed; the pid value is compared with the values of the subscriber area addresses GCA in a user smart card; when the pid value is consistent with the GCA values, if the authorization exists, the decryption is carried out; otherwise, the decryption and the program watch can not be carried out. The subscriber area addresses of the users are set by the conditional reception system of the present invention for controlling the user watch within a large range (in a provincial network) and preventing the users from moving among cities with identical programs and different fees.
Description
Technical field
The present invention relates to utilize a kind of conditional access system by the method that can show to realize the transregional management of user by GCA (the Geographic Card Address region smart card addressing) address and the PSI (Program Service Information) in the combination modification undernet of operator's programming in the smart card.
Background technology
Under the situation of digital TV network great development, how one in a big way in (in the provincial network) control user's fixed point watch, prevent that the user from arbitrarily moving between the different districts and cities of the identical charge of program, become the difficult problem of a puzzlement TV in CATV network company.
A this difficult problem occur and be by the special national conditions decision of China.Pass the program of encrypting and arrive each districts and cities' TV in CATV network company under upper level network company, each districts and cities' TV in CATV network company will be transmitted these programs rather than untie program or reenter multiplexer.Because the difference of each districts and cities' personal income level can produce the different situation of the license fee of same set of program in various places.Some users can utilize this situation to buy program from the low place of license fee, and watch to the high place of license fee even peddle.To have a strong impact on the equilibrium of the distribution of interests under the existing TV in CATV network company system of China like this, upset the general layout of existing cable TV network.Therefore the user strange land how to prevent is moved to teleview and is become the major issue that network company need solve.
Traditional encrypted transmission pattern is as shown in Figure 1: at first the data of digital program and value-added service are multiplexed into transport stream TS stream by multiplexer; Condition receiving system EMMG is connected to by HUB on the EMMI interface of multiplexer, and condition receiving system ECMG is connected on the ECMI interface of multiplexer by HUB.The scrambler of the DVB standard in the multiplexer produces control word CW, and multiplexer uses control word CW that the program of choosing (or service) is carried out scrambling.With Data Encryption Standard interface protocol and condition receiving system ECMG communication, CW sends ECMG to multiplexer control word by DVB.Produce corresponding ECM stream by condition receiving system ECMG, and the ECM stream that generates is injected in the transport stream TS stream through the ECMI interface of multiplexer.Subscriber Management System SMS sends authorization requests by the Subscriber Management System interface (SMS-I) of condition receiving system to the SAS Subscriber Authorization System SAS of condition receiving system, and SAS Subscriber Authorization System SAS response request produces an authorized user message EMM.The EMM that SAS Subscriber Authorization System SAS generates is injected into EMM in the multiplexer with the Data Encryption Standard interface protocol according to DVB by the EMM-INJECTOR injector.Multiplexer is multiplexed into the authorized user message EMM that receives in the transport stream TS stream.
Smart card among the user side set-top box STB produces and authorizes after receiving user authorization management information EMM.When the watching encrypted program, set-top box need find the ECM_PID corresponding with ciphered program from pmt table.ECM_PID is established into filtering channel, filter out the employed ECM data of ciphered program.After receiving the ECM data, the mandate of this program must be arranged in the smart card, could correctly untie the control word CW that has encrypted among the subscriber control information ECM.Because the communication between smart card and the user side set-top box STB is encrypted.So STB is receiving the data of communication, decipher once more and just can obtain smart card and solve control word.STB writes control word in the descrambling chip of DVB standard, just can reduce to have been looked audio frequency or data by scrambling.
Because EMM and ECM do not have the sign of special user's address in the traditional scheme, therefore in the network of whole operator during user mobile, reception flow process in each place when user's set-top box receives with smart card all is consistent, not the effective means that can control.Will cause some can utilize this situation to buy program and peddle the high place of license fee from the low place of license fee.Thereby have a strong impact on the equilibrium of the distribution of interests under the existing TV in CATV network company system of China, upset the interests general layout of existing cable TV network.
Summary of the invention
The technical problem to be solved in the present invention is to propose in a kind of condition receiving system the transregional method that manages of user, promptly by ca (conditionalaccess) the private data tabulation in condition receiving system definition and the generation PSI table, move in the random strange land of limited subscriber.
To the transregional method that manages of user, comprise the steps: in the condition receiving system of the present invention
Based on condition receiving system, the user is divided into different ground according to place districts and cities difference distinguishes the location, condition receiving system sends EMM to each user and authorizes the user ground that the user is set to distinguish the value of location GCA;
At little regional subnet scoping, the data of the ca private data tabulation in the front end system generation PSI table, and in the tabulation of ca private data, add the private information of distinguishing location GCA information with comprising authorized user message EMM information and user;
When watching program, the condition receiving system module on the set-top box at first receives the data from the ca private data tabulation of the PSI table of sub-network, the pid value of filtering and parsing EMM;
The value that condition receiving system module on the set-top box is distinguished location GCA with value and the ground of the user in the user smart card of the GCA that comprises in the ca private information compares, when both are consistent, illustrate that then this user is the local user,, then be decrypted and watch program if mandate is arranged; Otherwise, illustrate that this user is not the local user, no matter whether this user has mandate all can not decipher and watch program.
Because move or other reasonable grounds, when moving to another districts and cities, districts and cities can distinguish location GCA as the user to the user ground of operator's request replacing oneself.After operator's empirical tests, can distinguish location GCA for this user sends new user ground again, guarantee that the user who rationally moves can continue to watch encrypted digital TV program in new city.
Service condition receiving system of the present invention is provided with user's user ground and distinguishes the location, and is combined in PSI (the Program Service Information) table that the sub-network front end generates the ca private data.The method of the invention can one in a big way in (in the provincial network) control the watching of user, prevent that the user from moving between the different districts and cities of the identical charge of program.
Description of drawings
Fig. 1 is traditional Digital Television deciphering schematic flow sheet;
Fig. 2 is the schematic flow sheet of the method for the invention.
Fig. 3 is the schematic diagram of client's geographical zone address date structure of GCA
Embodiment
The location is distinguished on the user ground that the method for the invention mainly is to use condition receiving system that the user is set, and is combined in PSI (the Program Service Information) table that the sub-network front end generates the ca private data.The concrete principle of the method for the invention is described as follows:
Definition is carried out the form of zonal coding based on condition receiving system by user's actual address.Be that location GCA is distinguished on user ground; In a for example province, the tabulation of differentiation location of a big scope with formulating a user.Promptly the user is divided into different ground according to place districts and cities difference and distinguishes the location.There is identical ground to distinguish the location coding identical regional user.
By the rule of condition receiving system, send EMM to each user and authorize the user ground that the user is set to distinguish the value of location GCA according to above-mentioned actual address zonal coding.
At little regional subnet scoping, as the network of districts and cities, the data of the ca private data tabulation in the front end generation PSI table, and in the tabulation of ca private data, add the private information of distinguishing location GCA information with comprising authorized user message EMM information and user.
When watching program, the condition receiving system module on the set-top box at first receives the PSI table from sub-network, the pid value of filtering and parsing EMM; Handle the ca private information simultaneously.
In the ca private information that sub-network generates and sends, the value of location GCA is distinguished when consistent in the user ground in the numerical value of the GCA that is comprised and the user smart card, is that the local user has mandate just can normally watch program if this user then is described; Otherwise, illustrate that this user is not the local user, no matter whether this user has mandate all can not decipher and watch program.
Because the user in the user smart card distinguishes on ground location GCA value and is provided with by condition receiving system by operator, the user can't revise voluntarily by other any ways.And in a single day the user leaves districts and cities' network of oneself paying the fees, and moves to other districts and cities, just can't watch program.Thereby having realized controlling the transregional of user moves.
Carry out the form of zonal coding described in the method for the invention by user's actual address, in fact be exactly the data structure that defines client's geographical zone address, it be based on that the geographical position at smart card owner place divides (as the city, the district, the sub-district, street or the like).Each key set in the smart card all has the GCA of oneself to be used for indicating the geographical position.In each client's geographical zone address 4 bytes are arranged, be provided with by user's different geographical position for operator oneself.Referring to Fig. 3, comprise the geographical position coding of 3 byte and the attribute coding of 1byte, the geographical position coding is used for accurately showing user's position, and the attribute coding can be divided into different classes to the user area, maximum can reach 256 different classes.
Below be the example that a GCA is provided with shown in the table 1:
Table 1
| The position | Describe | Example |
| 1 | 15 cities | 0x0 → Beijing 0x1 → Shanghai 0x2 → Tianjin 0xE → .... 0xF → all cities |
| 2 | 15 districts | In case digitl is set to 0x1 (USA): 0x0 → Haidian District 0x1 → Dongcheng District 0x2 → Xicheng District 0x3 → Fengtai 0x4 → Central states 0xE → .... all districts in 0xF → appointment city |
| 3 | 15 sub-districts | 0x0 → 0x1 → 0xE → ... .... all sub-districts in 0xF → appointment district |
| 4 | 15 streets | 0x0 → 0x1 → .... all streets in 0xE → 0xF → designated cell |
| The position | Describe | Example |
| 5 | 15 roads | 0x0 → 0x1 → 0x2 → 0xE → .... all roads in 0xF → street |
| 6 | 15 buildings | 0x0 → 0x1 → 0x2 → 0xE → .... all buildings in 0xF → road |
Program provider can make up each data bit according to actual conditions, and specifies the actual address of their representatives.Such as the street, can merge the 3rd, 4 and use, maximum can be represented 255 streets like this.
Referring to table 2, the attribute coding can be divided into different classes to the user area, and maximum can reach 255 different classes.
Table 2
| Attribute codes | Describe |
| 0x00 | The doctor |
| 0x01 | Teacher |
| 0x02 | The lawyer |
| 0x03 | The student |
| 0x04 | ....... |
| 0xFE | ....... |
| 0xFF | All occupations |
The client's geographical zone address that defines in the method for the invention by operator by defining voluntarily and revise with condition receiving system.When the client's geographical zone address that defines and revise in the user smart card, be through the security engine encryption and to sign.The user is the client ground pave floor with bricks, stones etc. partition address that can't oneself adjust be provided with.
Specify the generting machanism of the PSI information in the subnet below.
Generate the purpose of the PSI of ca private data in sub-network, be with physically actual be same network of network environment, according to the difference of expenses standard, repartition out the experimental process network, to distinguish the charge difference of each network with PSI information; Utilize condition receiving system can differentiate the GCA function of amended different PSI information, as the foundation in verification heterogeneous networks zone.
PSI information in each subnet and the GCA of its appointment coding mate fully; so even the user is being with smart card and set-top box to move together; because the PSI information of receiving in his other sub-network of place and the GCA of smart card do not match; like this, will make this set-top box can't normally restore encrypted digital TV program.
But, when validated user is moved in another sub-network by a sub-network because of a variety of causes, just need operator's service condition receiving system to send the GCA coding that EMM changes this user, just can finish the work of validated user network migration smoothly, and needn't require the user to return set-top box and smart card to business hall, promptly do not need to buy other set-top box and smart card again, thereby reduce trouble.
The digital TV front-end of provincial network company front end system and standard without any difference.Before each districts and cities are transferred to user house downwards, the transport stream of the Digital Television of sending from provincial network company is made amendment at the front end system of each districts and cities.Main that revise is the PID of the ECM among the PMT (program map table), this value is made into other a invalid value, has promptly cut off getting in touch between encrypted digital TV program and relevant ECM.User's set-top box can't find the ECM-PID corresponding with this encrypted digital TV program.
Because can the correctness of this ECM_PID will determine user's set-top box find correct ECM data, thereby can reduce the control word of the encryption that in ECM, comprises.So also just directly control the user and can normally watch the enciphered digital TV programme corresponding with this ECM_PID.
In order to allow the digital television program that the validated user of this area can normal watching encrypted, also in the descriptor of having revised ECM_PID, insert a self-defining private data simultaneously, correct ECM_PID is generated one piece of data according to RSA Algorithm put into the private data section.This algorithm will be relevant with client's geographical zone address of user.
For example: service condition receiving system ID, for the condition receiving system of 0X4901 uses key 0X06 program A is encrypted, among the PMT in original transport stream, the ECM_PID that revises the program correspondence is that the 0X101 condition receives the CA descriptor, its form is referring to table 3.
Table 3
| Data name or effect | Data length (BIT) | Concrete numerical value |
| Descriptor identifier DES_TAG | 8 | 09 |
| Descriptor length DES_LENGTH | 8 | 2 |
| Condition receiving system ID CAS_ID | 16 | 4901 |
| Reserved field reserved | 3 | 0 |
| ECM_PID | 13 | 101 |
Front end in districts and cities 1, the GCA that defines these districts and cities is 0X01******, adjusts postcondition and receives the form of CA descriptor referring to table 4.
Table 4
| Data name or effect | Data length (BIT) | Concrete numerical value |
| Descriptor identifier DES_TAG | 8 | 09 |
| Descriptor length DES_LENGTH | 8 | 2 |
| Condition receiving system ID CAS_ID | 16 | 4901 |
| Reserved field reserved | 3 | 0 |
| ECM_PID | 13 | 999 (invalid) |
| Use the GCA sign | 2 | 1 |
| The key of GCA | 8 | 06 |
| Effective GCA length (the GCA length of use) | 2 | 1 (using first byte 01 of GCA to make parameter) |
| GCA_ECM_PID | 32 | *01 |
Front end in districts and cities 2, the GCA that defines these districts and cities is 0X02******, adjusts postcondition and receives the form of CA descriptor referring to table 5.
Table 5
| Data name or effect | Data length (BIT) | Concrete numerical value |
| Descriptor identifier DES_TAG | 8 | 09 |
| Descriptor length DES_LENGTH | 8 | 2 |
| Condition receiving system ID CAS_ID | 16 | 4901 |
| Reserved field reserved | 3 | 0 |
| ECM_PID | 13 | 999 |
| Use the GCA sign | 2 | 1 |
| The key of GCA | 8 | 06 |
| Effective GCA length (the GCA length of use) | 2 | 1 (using first byte 02 of GCA to make parameter) |
| GCA_ECM_PID | 32 | *02 |
The user in area 1 needs to seek earlier corresponding ECM_PID from PMT (program maptable) when receiving that mandate receives ciphered program A.This user's set-top box after receiving the amended descriptor of regional 1 front end, the value of earlier from smart card, reading the GCA of counterpart keys collection 06, and just can correctly restore the value of real ECM_PID according to the GCA_ECM_PID value in the descriptor private data.ECM_PID is established into filtering channel, filter out the ECM data corresponding with ciphered program.
If the mandate of this program has been arranged in the smart card, just can correctly untie the control word CW that has encrypted among the subscriber control information ECM.Because the communication between smart card and the user side set-top box STB is encrypted.So STB after receiving the data of communication, decipher once more and just can obtain smart card and solve control word.STB writes control word in the descrambling chip of DVB standard, just can reduce to have been looked audio frequency or data by scrambling.
If the user in area 2 goes to area 1, when receiving ciphered program A.Need from PMT, to seek earlier corresponding ECM_PID.This user's set-top box is after receiving the amended descriptor of regional 1 front end, the value of from the module of condition receiving system, reading the GCA of counterpart keys collection 06 earlier, according to the GCA_ECM_PID value in the descriptor private data, can not correctly restore the value of real ECM_PID.Like this, the ECM_PID of mistake established filtering channel after, can't filter out the ECM data corresponding with ciphered program.Also just can not reduce and looked audio frequency or data by scrambling.Thereby reached the requirement that move in control user strange land.
It should be noted that at last: above embodiment is the unrestricted technical scheme of the present invention in order to explanation only, although the present invention is had been described in detail with reference to the foregoing description, those of ordinary skill in the art is to be understood that: still can make amendment or be equal to replacement the present invention, and not breaking away from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (4)
- In the condition receiving system to the transregional method that manages of user, it is characterized in that: comprise the steps:Based on condition receiving system, the user is divided into different ground according to place districts and cities difference distinguishes the location, condition receiving system sends authorized user message EMM to each user, authorizes the user ground that user smart card is set to distinguish the value of location GCA;At little regional subnet scoping, the condition that front end system generates in the program service information PSI table receives the data that the ca private data is tabulated, and interpolation comprises the packet identifier pid value of authorized user message EMM information and the private information that location GCA information is distinguished on user ground in the tabulation of ca private data, the smart card GCA coding that the user uses in the numerical value of the GCA that the CA private information is comprised in the program service information PSI information in the described subnet and this sub-network is coupling fully, the value that location GCA is distinguished on the user ground in the described smart card by operator by the condition receiving system setting;When watching program, the condition receiving system module on the set-top box at first receives the data that receive the tabulation of ca private data from the condition of the program service information PSI table of sub-network, the packet identifier pid value of filtering and parsing authorized user message EMM;Condition is received the value of the user ground differentiation location GCA that comprises in the ca private information to condition receiving system module on the set-top box and the value of the ground of the user in user smart card differentiation location GCA compares, when both are consistent, illustrate that then this user is the local user, if mandate is arranged, then be decrypted and watch program; Otherwise, illustrate that this user is not the local user, no matter whether this user has mandate all can not decipher and watch program.
- 2. in a kind of condition receiving system according to claim 1 to the transregional method that manages of user, it is characterized in that: described different and be divided into different ground and distinguish the location according to place districts and cities the user, specifically comprise: the data structure that defines client's geographical zone address, in each client's geographical zone address 4 bytes are arranged, be provided with by user's different geographical position for operator oneself.
- 3. in a kind of condition receiving system according to claim 2 to the transregional method that manages of user, it is characterized in that: in 4 bytes in described client's geographical zone address, preceding 3 bytes are the geographical position coding, be used to show user's position, the byte in back is the attribute coding, is used for the user area is divided into different classifications.
- 4. in a kind of condition receiving system according to claim 1 to the transregional method that manages of user, it is characterized in that: when described front end system generates condition in the program service information PSI table and receives the data of ca private data tabulation, comprise that also packet identifier pid value with the subscriber control information ECM in the Program Map Table pmt table makes other a invalid value into; Simultaneously, insert a self-defining private data in the descriptor of ECM_PID.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101160692A CN100364331C (en) | 2003-12-30 | 2003-12-30 | A method for managing cell crossing of subscriber in condition access system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101160692A CN100364331C (en) | 2003-12-30 | 2003-12-30 | A method for managing cell crossing of subscriber in condition access system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1635790A CN1635790A (en) | 2005-07-06 |
| CN100364331C true CN100364331C (en) | 2008-01-23 |
Family
ID=34843552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101160692A Expired - Fee Related CN100364331C (en) | 2003-12-30 | 2003-12-30 | A method for managing cell crossing of subscriber in condition access system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100364331C (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100452829C (en) * | 2006-09-21 | 2009-01-14 | 青岛有线宽带数字电视发展有限公司 | Multi-area set-top box mutual uncirculating method |
| CN101150708B (en) * | 2007-10-23 | 2011-09-14 | 华为终端有限公司 | Method, system and device for hiding program |
| CN101588472B (en) * | 2008-05-22 | 2012-11-07 | 华为技术有限公司 | Method, device and system for controlling program broadcasting |
| CN101753964B (en) * | 2008-12-02 | 2012-06-27 | 北京视博数字电视科技有限公司 | Method and device for realizing the terminal roaming service of digital TV |
| CN101431655B (en) * | 2008-12-09 | 2012-04-18 | 四川长虹电器股份有限公司 | Method for implementing zone control of digital television |
| CN101771856B (en) * | 2008-12-26 | 2012-06-27 | 北京视博数字电视科技有限公司 | Information transmitting method and device |
| CN101521795A (en) * | 2008-12-30 | 2009-09-02 | 深圳市同洲电子股份有限公司 | Digital television receiving terminal, positioning method and system thereof |
| CN101867782B (en) * | 2010-05-25 | 2013-01-23 | 华为终端有限公司 | Set-top box control method and device |
| CN103260077B (en) * | 2012-02-15 | 2018-04-10 | 北京四达时代软件技术股份有限公司 | Digital TV region control method and the equipment based on this method |
| CN104936007A (en) * | 2014-03-20 | 2015-09-23 | 四达时代通讯网络技术有限公司 | Digital television zone control method and control system and digital cable television system |
| CN104935959A (en) * | 2015-04-23 | 2015-09-23 | 湖南兆华世纪新媒体技术有限公司 | Method for realizing regional control of advertising system based on CA authorization |
| EP3301938A1 (en) * | 2016-09-28 | 2018-04-04 | Thomson Licensing | Method, system and apparatus for granting location-based credentials to a device |
| CN109756743B (en) * | 2019-01-21 | 2021-03-23 | 湖北省广播电视信息网络股份有限公司 | Localized information synchronous pushing system and method |
| CN109819283B (en) * | 2019-01-21 | 2021-03-23 | 湖北省广播电视信息网络股份有限公司 | Localized information pushing system and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5565909A (en) * | 1992-08-31 | 1996-10-15 | Television Computer, Inc. | Method of identifying set-top receivers |
| CN1171015A (en) * | 1996-06-28 | 1998-01-21 | 汤姆森多媒体公司 | Conditional access system and smartcard allowing such access |
| US6009116A (en) * | 1995-05-05 | 1999-12-28 | Philip A Rubin And Associates, Inc. | GPS TV set top box with regional restrictions |
| EP1043895A2 (en) * | 1999-04-09 | 2000-10-11 | Pioneer Corporation | Conditional access system of CATV |
| CN1317204A (en) * | 1998-09-11 | 2001-10-10 | 汤姆森多媒体公司 | Conditional access system decoder and entitlement management method in same |
-
2003
- 2003-12-30 CN CNB2003101160692A patent/CN100364331C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5565909A (en) * | 1992-08-31 | 1996-10-15 | Television Computer, Inc. | Method of identifying set-top receivers |
| US6009116A (en) * | 1995-05-05 | 1999-12-28 | Philip A Rubin And Associates, Inc. | GPS TV set top box with regional restrictions |
| CN1171015A (en) * | 1996-06-28 | 1998-01-21 | 汤姆森多媒体公司 | Conditional access system and smartcard allowing such access |
| CN1317204A (en) * | 1998-09-11 | 2001-10-10 | 汤姆森多媒体公司 | Conditional access system decoder and entitlement management method in same |
| EP1043895A2 (en) * | 1999-04-09 | 2000-10-11 | Pioneer Corporation | Conditional access system of CATV |
Non-Patent Citations (3)
| Title |
|---|
| 数字电视的条件接收系统. 冯传岗.现代电视技术. 2003 * |
| 数字视频广播条件接收. 丁莉.北京广播学院学报（自然科学版），第9卷第4期. 2002 * |
| 数字高清晰度电视条件接收系统实现方案探讨. 姚晓东，王宏远.武汉科技学院学报，第13卷第4期. 2000 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1635790A (en) | 2005-07-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100364331C (en) | A method for managing cell crossing of subscriber in condition access system | |
| CN102577421B (en) | For using the digital copyright management protection of the content of social TV service identification | |
| CN100499799C (en) | Transmission system of supplying conditional access for transmitted data | |
| CN101199205B (en) | Local conditional access method for mobile equipment | |
| EP2150050B1 (en) | Scramble key management unit, scramble key management information transmitting unit, method for scramble key output management, scramble key management program, license information management unit, license management information transmitting unit, method for license information output management, and license information man | |
| US7530088B2 (en) | Topology based proximity validation for broadcast content | |
| US8205243B2 (en) | Control of enhanced application features via a conditional access system | |
| CN1310497C (en) | CA system for using multiple cipher key broadcasting DTV to different service supply merchants and service areas | |
| CN101442655B (en) | Digital copyright management system of digital program broadcast system | |
| CN1183198A (en) | Information terminal having reconfigurable memory | |
| CN1163073C (en) | Method and system for handling two CA systems in same receiver | |
| CN101507272A (en) | Method of revocation of security modules used to secure broadcast messages | |
| CN100571371C (en) | A kind of set-top box dual-channel descrambling method and use the set-top box of this method | |
| KR20040067970A (en) | System for receiving broadcast digital data comprising a master digital terminal, and at least one slave digital terminal | |
| CN103975604A (en) | Method and multimedia unit for processing a digital broadcast transport stream | |
| CN100502496C (en) | Digital TV user authentication system based on mobile device | |
| CN1867066A (en) | Digital television program broadcasting system and method | |
| KR20050039705A (en) | Controlled-access method and system for transmitting scrambled digital data in a data exchange network | |
| CN101394297B (en) | DRM service implementing method, equipment and system under broadcast environment | |
| CN108886637A (en) | Broadcast receiver and portable information terminal | |
| CN103051638A (en) | Multimedia data encryption method and multimedia data encryption distributing system | |
| JP2006510323A (en) | Access control method and system for digital pay TV | |
| CN101425862B (en) | Mobile multimedia broadcast service operation management system and method | |
| CN100421468C (en) | Method and system for realizing combined authorization of enciphering system | |
| CN103237245A (en) | Vehicle-mounted DVB (Digital Video Broadcasting) conditional access system for identifying set-top-box identity |
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 | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |