CN103986954B - A kind of set top box method of controlling security and system - Google Patents
A kind of set top box method of controlling security and system Download PDFInfo
- Publication number
- CN103986954B CN103986954B CN201410205675.XA CN201410205675A CN103986954B CN 103986954 B CN103986954 B CN 103986954B CN 201410205675 A CN201410205675 A CN 201410205675A CN 103986954 B CN103986954 B CN 103986954B
- Authority
- CN
- China
- Prior art keywords
- top box
- set top
- smart card
- ident value
- chip identification
- 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
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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
- H04N21/426—Internal components of the client ; Characteristics thereof
-
- 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]
-
- 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
Abstract
The present invention relates to a kind of set top box method of controlling security and system, when this method is included in set top box insertion smart card, obtaining being used for of being stored in the chip identification and advanced security chip of set top box advanced security chip in predetermined register identifies the ident value whether advanced security pattern opens；Chip identification and ident value are received, and judges whether the corresponding set top box of chip identification opens advanced security pattern according to ident value, if not opening, control set top box is not authorized to smart card.The present invention is using automatic detection and carries out the mode by the way of security control instead of manually spot-check, the safety of all set top boxes can be controlled, avoid manually spot-check the careless omission caused, effectively prevent set top box do not open advanced security pattern and by the decryption system of other people decryption set-top boxes, ensure the rights and interests of user and operator, it is ensured that the security of set top box.
Description
Technical field
The present invention relates to communication field, more particularly to a kind of set top box method of controlling security and system.
Background technology
At present, set top box when in use, for protection copyright, user's right and operator's rights and interests, the advanced security of set top box
Chip must be turned on advanced security pattern (abbreviation Gao An) before dispatching from the factory and protection be encrypted.
Generally, detection set top box dispatches from the factory, and whether to open Gao An method be exactly by CA (Conditional Access) certification
Company is irregular to send professional to be spot-check to factory, but this artificial selective examination mode randomness once in a while is too strong, easily
Slip, it is impossible to which it is all to open Gao An on request to ensure the every set top box dispatched from the factory.If set top box is not opened before dispatching from the factory
Open Gao An, it is impossible to carry out advanced security protection, the set top box that other people are easy to never open Gao An is started with, decryption set-top box
Decryption system, infringement user and operator rights and interests, have a strong impact on the security of set top box.
The content of the invention
In view of this, it is necessary to dispatched from the factory for above-mentioned set top box and be not turned on Gao An, the problem of influenceing set top box security,
A kind of set top box method of controlling security is provided.
In addition, also providing a kind of set top box safety control system.
A kind of set top box method of controlling security, comprises the following steps：
When set top box inserts smart card, the chip identification and advanced security chip of set top box advanced security chip are obtained
Stored in interior predetermined register be used for identify the ident value whether advanced security pattern opens；
Chip identification and ident value are received, and judges whether the corresponding set top box of chip identification opens senior according to ident value
Safe mode, if not opening, control set top box is not authorized to smart card, so that set top box can not be solved to program
Disturb, set top box is controlled safely.
A kind of set top box safety control system, including：
Mark acquiring unit, set top box insert smart card when, obtain set top box advanced security chip chip identification with
And stored in advanced security chip in predetermined register be used for identify the ident value whether advanced security pattern opens；
Security control unit, receives chip identification and ident value, and judge the corresponding machine top of chip identification according to ident value
Whether box opens advanced security pattern, if not opening, and control set top box is not authorized to smart card, so that set top box can not
Program is descrambled, set top box is controlled safely.
The inventive method and system, are examined according to the chip identification of set top box and to whether high peace opens related ident value
Survey judges whether set top box opens advanced security pattern as requested, controls set top box to be carried out to smart card if not opening
Authorize, prevent set top box from descrambling to program, so that the safety to set top box is controlled, so using automatic detection simultaneously
The mode for carrying out security control replaces the mode manually spot-check, and the safety of all set top boxes can be controlled, it is to avoid artificial
Spot-check the careless omission that causes, effectively prevent set top box do not open advanced security pattern and by the decryption system of other people decryption set-top boxes
System, ensures the rights and interests of user and operator, it is ensured that the security of set top box.
Brief description of the drawings
Fig. 1 is the flow chart of the set top box method of controlling security in one embodiment；
Fig. 2 is the structure chart of the set top box safety control system in one embodiment.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
Fig. 1 is the flow chart of the set top box method of controlling security in one embodiment.As shown in figure 1, the set top box is safe
Control method comprises the following steps：
S10：Set top box insert smart card when, obtain set top box advanced security chip chip identification (ChipID) and
Stored in advanced security chip in predetermined register be used for identify the ident value whether advanced security pattern opens.
Set top box when using (used after debugging, detect or dispatching from the factory before dispatching from the factory etc.), it is necessary to first insert smart card, intelligence
It can block for being controlled to set top box descrambled program, user's right is protected.After smart card insertion set top box, set top box
Smart card is resetted first.
For the set top box of advanced security pattern, each set top box has an advanced security chip, and each is senior
Safety chip all has unique and mutually different chip identification (ChipID).It is which that can be uniquely determined according to chip identification
Platform set top box.A register is preselected in advanced security chip, the predetermined register is used to whether open according to set top box
Open Gao An (i.e. whether advanced security chip opens advanced security pattern) and store different ident values.If for example, set top box
Advanced security pattern is opened, then an ident value A can be stored in the predetermined register, if set top box does not open advanced security mould
Formula, then ident value is B.According to the difference of ident value, it can be determined that whether set top box opens advanced security pattern.Inserted in set top box
When entering smart card, the ident value in the predetermined register is obtained, situation, root are opened so that set top box advanced security pattern can be understood
Set top box is controlled safely according to unlatching situation.To ensure uniqueness and security, in this embodiment, ident value and chip
Mark association, it is different that each set top box opens the ident value stored in advanced security pattern predetermined register.
S20：Chip identification and ident value are received, and judges whether the corresponding set top box of chip identification is opened according to ident value
Advanced security pattern.If not opening, control set top box is not authorized to smart card, so that set top box can not be carried out to program
Descrambling, is controlled safely to set top box.
After the ident value in obtaining chip identification and predetermined register, the chip identification and ident value obtained is received,
And judge whether set top box opens advanced security pattern according to ident value.In this embodiment, chip identification and mark are received
The step of value is specially：Obtain after chip identification and ident value, receive and be sent to smart card chip identification is received by smart card
And ident value.It is further to ensure the security received because chip identification and ident value are related to the security of set top box,
Receive chip identification and be specially the step of ident value：Obtain after chip identification and ident value, using Predistribution Algorithm to chip mark
Know and ident value is encrypted, the chip identification and ident value after encryption are sent to smart card, smart card uses pre- after receiving
Put algorithm to be decrypted, obtain chip identification and ident value.So chip identification and ident value are during reception is sent, completely
Carried out in the case of encryption, prevent outside acquisition or distort, so as to greatly ensure that security.
Chip identification and ident value are being received, is being judged according to ident value, set top box (or advanced security core is judged
Piece) whether open advanced security pattern.In this embodiment, judged whether to open the step of advanced security pattern according to ident value
It is rapid to be specially：Smart card judges whether the ident value is value corresponding with opening advanced security pattern according to ident value, if then
Set top box opens advanced security pattern, does not otherwise open.
If it is judged that not open advanced security pattern, then there is potential safety hazard, it is necessary to machine top in this set-top box
The safety of box is controlled, and set top box can not be authorized to smart card, because smart card is not authorized, it is possible to control
Set top box can not carry out program descrambling, and set top box can not carry out test detection before dispatching from the factory, can not normally be used after dispatching from the factory, machine
Top box is not turned on high peace can be examined out at any time, be easy to CA companies to check and punish.Set top box is to normally use, then
Gao An must be correctly opened by upgrading, returning factory or more renew the measures such as machine, thus force every set top box to force out
Opening advanced security pattern could normally use, without manually checking one by one, so that the safety to set top box is controlled.
In further embodiment, if not opening, the step of control set top box is not authorized to smart card has
Body is：If not opening, control smart card is sent to set top box does not open high peace filtration parameter, do not open high peace filtration parameter by
Set top box receives and sets filter, prevents set top box from receiving the Entitlement Management Message (EMM) that front end is sent, control machine top
Box can not be to smart card mandate.When judging that set top box does not open advanced security, smart card sends to set top box and does not open height
Peace filtration parameter, this is not opened the filter that high peace filtration parameter is used for setting set top box, filtration parameter is pacified using height is not opened
The filter of setting can not receive the EMM sent from front end, due to there is the information authorized to smart card in EMM, so
Set top box can not receive EMM, so that the information authorized to smart card can not be obtained, it is impossible to which smart card is authorized,
Smart card do not have it is authorized so allow for set top box and program can not be descrambled, so as to control the safety of set top box.
If in addition, tester or research staff need to adjust the set top box for not opening advanced security pattern
Examination, because set top box can not now descramble to program, tester can be contacted with front end, and request front end sends non-
Advanced security pattern test case, so that set top box can be descrambled so that tester is debugged.
This method, judgement machine top is detected according to the chip identification of set top box and to whether high peace opens related ident value
Whether box opens advanced security pattern as requested, controls set top box to be authorized to smart card if not opening, makes machine
Top box can not descramble to program, so that the safety to set top box is controlled, so uses automatic detection and carry out safety
The mode of control replaces the mode manually spot-check, and the safety of all set top boxes can be controlled, it is to avoid artificial selective examination is caused
Careless omission, effectively prevent set top box from not opening advanced security pattern and by the decryption system of other people decryption set-top boxes, ensureing and use
Family and the rights and interests of operator, it is ensured that the security of set top box.
Meanwhile, the present invention also provides a kind of set top box safety control system.As shown in Fig. 2 the system includes：
Mark acquiring unit 100, when set top box inserts smart card, obtains the chip identification of set top box advanced security chip
(ChipID) and in advanced security chip stored in predetermined register be used for identify the mark whether advanced security pattern opens
Knowledge value.
Set top box when using (used after debugging, detect or dispatching from the factory before dispatching from the factory etc.), it is necessary to first insert smart card, intelligence
It can block for being controlled to set top box descrambled program, user's right is protected.After smart card insertion set top box, set top box
Smart card is resetted first.
For the set top box of advanced security pattern, each set top box has an advanced security chip, and each is senior
Safety chip all has unique and mutually different chip identification (ChipID).It is which that can be uniquely determined according to chip identification
Platform set top box.A register is preselected in advanced security chip, the predetermined register is used to whether open according to set top box
Open Gao An (i.e. whether advanced security chip opens advanced security pattern) and store different ident values.If for example, set top box
Advanced security pattern is opened, then an ident value A can be stored in the predetermined register, if set top box does not open advanced security mould
Formula, then ident value is B.According to the difference of ident value, it can be determined that whether set top box opens advanced security pattern.Inserted in set top box
When entering smart card, mark acquiring unit 100 obtains the ident value in the predetermined register, can understand set top box advanced security
Pattern opens situation, and set top box is controlled safely according to unlatching situation.To ensure uniqueness and security, ident value and core
Piece mark association, it is different that each set top box opens the ident value stored in advanced security pattern predetermined register.
Security control unit 200, receives chip identification and ident value, and judge the corresponding machine of chip identification according to ident value
Whether top box opens advanced security pattern.If not opening, control set top box is not authorized to smart card, so that set top box is not
Program can be descrambled, set top box is controlled safely.
After the ident value during mark acquiring unit 100 obtains chip identification and predetermined register, security control unit
200 receive the chip identification and ident value obtained, and judge whether set top box opens advanced security pattern according to ident value.
In the embodiment, the step of receiving chip identification and ident value is specially：Mark acquiring unit 100 obtains chip identification and mark
After value, security control unit 200 receives and is sent to smart card receives chip identification and ident value by smart card.Due to chip mark
Know the security for being related to set top box with ident value, further to ensure the security received, mark acquiring unit 100 is obtained
After chip identification and ident value, chip identification and ident value are encrypted using Predistribution Algorithm for security control unit 200, will be added
Chip identification and ident value after close are sent to smart card, and smart card is decrypted after receiving using Predistribution Algorithm, obtains chip
Mark and ident value.So chip identification and ident value are carried out completely in the case of encryption, prevented during reception is sent
Outside obtains or distorted, so as to greatly ensure that security.
Chip identification and ident value are being received, is being judged according to ident value, set top box (or advanced security core is judged
Piece) whether open advanced security pattern.In this embodiment, security control unit 200 control smart card, by smart card according to
Ident value judges whether the ident value is value corresponding with opening advanced security pattern, if then set top box opens advanced security
Pattern, is not otherwise opened.
If it is judged that not open advanced security pattern, then there is potential safety hazard, it is necessary to machine top in this set-top box
The safety of box is controlled, and set top box can not be authorized to smart card, because smart card is not authorized, it is possible to control
Set top box can not carry out program descrambling, and set top box can not carry out test detection before dispatching from the factory, can not normally be used after dispatching from the factory, machine
Top box is not turned on high peace can be examined out at any time, be easy to CA companies to check and punish.Set top box is to normally use, then
Gao An must be correctly opened by upgrading, returning factory or more renew the measures such as machine, thus force every set top box to force out
Opening advanced security pattern could normally use, without manually checking one by one, so that the safety to set top box is controlled.
In further embodiment, if not opening, control set top box is not authorized specially to smart card：If
Do not open, security control unit 200 then controls smart card to be sent to set top box and do not open high peace filtration parameter, and height is not opened and was pacified
Filter parameter is received by set top box and sets filter, prevents set top box from receiving the Entitlement Management Message (EMM) that front end is sent,
Control set top box can not be to smart card mandate.When judging that set top box does not open advanced security, security control unit 200 is controlled
Smart card is sent to set top box does not open high peace filtration parameter, and this does not open the filtering that high peace filtration parameter is used for setting set top box
Device, the EMM that is sent from front end can not be received using the filter that high peace filtration parameter sets is not opened, due to having in EMM pair
The information that smart card is authorized, such set top box can not receive EMM, so that the letter authorized to smart card can not be obtained
Breath, it is impossible to authorized to smart card, smart card do not have it is authorized it is such allow for set top box and program can not be descrambled,
So as to control the safety of set top box.
If in addition, tester or research staff need to adjust the set top box for not opening advanced security pattern
Examination, because set top box can not now descramble to program, tester can be contacted with front end, and request front end sends non-
Advanced security pattern test case, so that set top box can be descrambled so that tester is debugged.
The system, judgement machine top is detected according to the chip identification of set top box and to whether high peace opens related ident value
Whether box opens advanced security pattern as requested, controls set top box to be authorized to smart card if not opening, makes machine
Top box can not descramble to program, so that the safety to set top box is controlled, so uses automatic detection and carry out safety
The mode of control replaces the mode manually spot-check, and the safety of all set top boxes can be controlled, it is to avoid artificial selective examination is caused
Careless omission, effectively prevent set top box from not opening advanced security pattern and by the decryption system of other people decryption set-top boxes, ensureing and use
Family and the rights and interests of operator, it is ensured that the security of set top box.
The inventive method and system, are examined according to the chip identification of set top box and to whether high peace opens related ident value
Survey judges whether set top box opens advanced security pattern as requested, controls set top box to be carried out to smart card if not opening
Authorize, prevent set top box from descrambling to program, so that the safety to set top box is controlled, so using automatic detection simultaneously
The mode for carrying out security control replaces the mode manually spot-check, and the safety of all set top boxes can be controlled, it is to avoid artificial
Spot-check the careless omission that causes, effectively prevent set top box do not open advanced security pattern and by the decryption system of other people decryption set-top boxes
System, ensures the rights and interests of user and operator, it is ensured that the security of set top box.
These are only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Any modifications, equivalent substitutions and improvements made within principle etc., should be included in the scope of the protection.
Claims (8)
1. a kind of set top box method of controlling security, it is characterised in that comprise the following steps：
When set top box inserts smart card, obtain pre- in the chip identification and advanced security chip of set top box advanced security chip
Being used for of determining to store in register identifies the ident value whether advanced security pattern opens；
Chip identification and ident value are received, and judges whether the corresponding set top box of chip identification opens advanced security according to ident value
Pattern, if not opening, control set top box is not authorized to smart card, so that set top box can not descramble to program, it is right
Set top box is controlled safely；
If described do not open, the step of control set top box is not authorized to smart card is specially：
If not opening, control smart card is sent to set top box does not open high peace filtration parameter, do not open high peace filtration parameter by
Set top box receives and sets filter, prevents set top box from receiving the Entitlement Management Message that front end is sent, control set top box is not
Can be to smart card mandate.
2. set top box method of controlling security according to claim 1, it is characterised in that the ident value is closed with chip identification
Connection, it is different that each set top box opens the ident value stored in advanced security pattern predetermined register.
3. set top box method of controlling security according to claim 1, it is characterised in that the reception chip identification and mark
The step of value is specially：
Obtain after chip identification and ident value, receive and be sent to smart card by smart card reception chip identification and ident value.
4. set top box method of controlling security according to claim 2, it is characterised in that the reception chip identification and mark
The step of value is specially：
Obtain after chip identification and ident value, chip identification and ident value are encrypted using Predistribution Algorithm, after encryption
Chip identification and ident value are sent to smart card, and smart card is decrypted after receiving using Predistribution Algorithm, obtain chip identification and
Ident value.
5. a kind of set top box safety control system, it is characterised in that including：
Mark acquiring unit, when set top box inserts smart card, obtains the chip identification and height of set top box advanced security chip
Stored in level security chip in predetermined register be used for identify the ident value whether advanced security pattern opens；
Security control unit, receives chip identification and ident value, and judge that the corresponding set top box of chip identification is according to ident value
No unlatching advanced security pattern, if not opening, control set top box is not authorized to smart card, so that set top box can not be to section
Mesh is descrambled, and set top box is controlled safely；
If described do not open, the step of control set top box is not authorized to smart card is specially：
If not opening, control smart card is sent to set top box does not open high peace filtration parameter, do not open high peace filtration parameter by
Set top box receives and sets filter, prevents set top box from receiving the Entitlement Management Message that front end is sent, control set top box is not
Can be to smart card mandate.
6. set top box safety control system according to claim 5, it is characterised in that the ident value is closed with chip identification
Connection, it is different that each set top box opens the ident value stored in advanced security pattern predetermined register.
7. set top box safety control system according to claim 5, it is characterised in that the mark acquiring unit obtains core
Piece is identified with after ident value, and the security control unit receives and is sent to smart card by smart card reception chip identification and mark
Value.
8. set top box safety control system according to claim 7, it is characterised in that the mark acquiring unit obtains core
Piece is identified with after ident value, and chip identification and ident value are encrypted using Predistribution Algorithm for the security control unit, will be added
Chip identification and ident value after close are sent to smart card, and smart card is decrypted after receiving using Predistribution Algorithm, obtains chip
Mark and ident value.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410205675.XA CN103986954B (en) | 2014-05-15 | 2014-05-15 | A kind of set top box method of controlling security and system |
| PCT/CN2015/077312 WO2015172623A1 (en) | 2014-05-15 | 2015-04-23 | Set top box security control method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410205675.XA CN103986954B (en) | 2014-05-15 | 2014-05-15 | A kind of set top box method of controlling security and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103986954A CN103986954A (en) | 2014-08-13 |
| CN103986954B true CN103986954B (en) | 2017-08-25 |
Family
ID=51278763
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410205675.XA Expired - Fee Related CN103986954B (en) | 2014-05-15 | 2014-05-15 | A kind of set top box method of controlling security and system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103986954B (en) |
| WO (1) | WO2015172623A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103986954B (en) * | 2014-05-15 | 2017-08-25 | 深圳市九洲电器有限公司 | A kind of set top box method of controlling security and system |
| CN110337033B (en) * | 2019-07-04 | 2021-05-18 | 深圳市魔乐视科技有限公司 | Anti-piracy system of set top box |
| CN111954073B (en) * | 2020-07-15 | 2022-07-12 | 深圳市九洲电器有限公司 | Method for quickly realizing android set top box production software and related products |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6711683B1 (en) * | 1998-05-29 | 2004-03-23 | Texas Instruments Incorporated | Compresses video decompression system with encryption of compressed data stored in video buffer |
| CN101742072A (en) * | 2009-12-18 | 2010-06-16 | 四川长虹电器股份有限公司 | Anti-copy method for set-top box software |
| CN102075812A (en) * | 2010-08-10 | 2011-05-25 | 深圳市九洲电器有限公司 | Data receiving method and system of digital television |
| CN103686332A (en) * | 2013-12-11 | 2014-03-26 | 深圳创维数字技术股份有限公司 | Security function starting method and terminal |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102156647B (en) * | 2011-01-26 | 2013-10-09 | 深圳市九洲电器有限公司 | Advanced safety setting method and advanced safety setting device for main chip of set-top box |
| CN102572591B (en) * | 2011-12-09 | 2014-03-19 | 深圳创维数字技术股份有限公司 | Method and device for producing advanced security digital television set-top box |
| CN103986954B (en) * | 2014-05-15 | 2017-08-25 | 深圳市九洲电器有限公司 | A kind of set top box method of controlling security and system |
-
2014
- 2014-05-15 CN CN201410205675.XA patent/CN103986954B/en not_active Expired - Fee Related
-
2015
- 2015-04-23 WO PCT/CN2015/077312 patent/WO2015172623A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6711683B1 (en) * | 1998-05-29 | 2004-03-23 | Texas Instruments Incorporated | Compresses video decompression system with encryption of compressed data stored in video buffer |
| CN101742072A (en) * | 2009-12-18 | 2010-06-16 | 四川长虹电器股份有限公司 | Anti-copy method for set-top box software |
| CN102075812A (en) * | 2010-08-10 | 2011-05-25 | 深圳市九洲电器有限公司 | Data receiving method and system of digital television |
| CN103686332A (en) * | 2013-12-11 | 2014-03-26 | 深圳创维数字技术股份有限公司 | Security function starting method and terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103986954A (en) | 2014-08-13 |
| WO2015172623A1 (en) | 2015-11-19 |
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