CN101699859B - Method for upgrading deciphering chip of conditional access system of digital TV - Google Patents
Method for upgrading deciphering chip of conditional access system of digital TV Download PDFInfo
- Publication number
- CN101699859B CN101699859B CN200910309279A CN200910309279A CN101699859B CN 101699859 B CN101699859 B CN 101699859B CN 200910309279 A CN200910309279 A CN 200910309279A CN 200910309279 A CN200910309279 A CN 200910309279A CN 101699859 B CN101699859 B CN 101699859B
- Authority
- CN
- China
- Prior art keywords
- deciphering chip
- cryptographic algorithm
- chip
- key
- hash
- 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.)
- Active
Links
Landscapes
- Storage Device Security (AREA)
Abstract
The invention relates to the technology of a conditional access system of a digital TV, solves the problem that the cryptographic algorithm of the deciphering chip of the traditional conditional access system of the digital TV is usually singular and fixed, and provides a method for updating the deciphering chip of the conditional access system of the digital TV. The technical scheme comprises that: the EEPROM of the deciphering chip is divided into a sensitive data area, a cipher algorithm area and a common data area, a master control key generating and updating various algorithms and summary, together with a deciphering chip operation system, are together masked on the ROM of the cipher chip, and the confidentiality and the integrity of the master control key and the summary are strictly protected according to a certain safety mechanism so as to construct a deciphering chip updating mechanism; therefore, the deciphering chip can safely and rapidly update a new cryptographic algorithm, a working key and configured data, and the former cryptographic algorithm, working key and configured data are safely destroyed. The method has the advantages of cost saving, and suitability for the deciphering chip of the conditional access system of the digital TV.
Description
Technical field
The present invention relates to the technology of digital television conditional access system, particularly the technology of deciphering chip of conditional access system of digital TV.
Background technology
After DTV is meant and adopts the digital processing technology means with technical finesses such as analog signal samplings such as image and sound, coding, scrambling, modulation; Sending into the TV network platform broadcasts in real time; The digital information processing system that supplies the user to receive, play; Extensive startup along with China DTV market; SARFT(The State Administration of Radio and Television) has successively issued the industrial policy of multinomial simulated television to the DTV conversion, and each city-level digital TV network operator also begins at field layout DTV Operation Networks such as wired, ground, satellites one after another.The condition reception technique is the technology that the control user receives the broadcasting service mandate; Realization has only and pays and could receive the TV programme and the service business of reservation in advance through the user after authorize allowing, and condition receiving and deciphering module is the Primary Component of embedding digital TV terminal, is embedded in digital television terminal system decrypted key data with the form of processor smart card or chip; In present deciphering module development and Design; The method that generally adopts is that cryptographic algorithm is directly injected in the processor chips, processes the deciphering chip kernel, is packaged into the form of card or chip again; Such design makes system simplification; But it is normally single fixing that the problem of bringing is a cryptographic algorithm, in case algorithm, key, configuration data is broken or it is dangerous to be proved to be, that whole deciphering chip just cannot reuse; Must change smart card or chip on a large scale, this can cause huge cost.At present, the hacker of lot of domestic and foreign adopts the different techniques means that deciphering chip of conditional access system is attacked.The digital television conditional access system of current popular seems as safe as a house; Through 3 infill layers; Or multiple layer encrypting protection associated authorization information more, but system is made up of a plurality of links after all, and the hacker can be according to the characteristics of system; Adopt different attack method attacking system weak links, the record that all has related system to be broken both at home and abroad.
Summary of the invention
Technical problem to be solved by this invention in order to overcome the normally single fixing shortcoming of present deciphering chip of conditional access system of digital TV cryptographic algorithm, provides a kind of method for updating deciphering chip of conditional access system of digital TV exactly.
The present invention solves its technical problem, and the technical scheme of employing is that method for updating deciphering chip of conditional access system of digital TV is characterized in that, may further comprise the steps:
A. the EEPROM with deciphering chip is divided into sensitive data district, cryptographic algorithm district and general data district; And the enforcement access control is set respectively; The sensitive data district is set to chip exterior and does not can read and can not write; The cryptographic algorithm district is set to chip exterior and does not can read and can write, and the general data district is set to chip exterior and can reads and can write;
B. the digital television conditional access system developer generates various algorithm master control key Key1, the Key2 of safeguard protection dynamic update ... Keyn; And constitute an information packet with each supplementary, and information packet is done the hash summary, generate Tag1, Tag2 ... Tagn; Be Tagn=hash (Keyn+message); Wherein, message representes each supplementary, and said each supplementary comprises condition receiving system developer title, deciphering chip operating system mask batch number and mask time;
C. with various algorithm master control key Key1, Key2 ... Keyn and hash summary Tag1, Tag2 ... Tagn forms a master control key packet; The master control key packet is done the hash summary; Generate Tag, i.e. Tag=hash (Key1+Key2+ ... + Keyn+Tag1+Tag2+ ... + Tagn);
D. with various algorithm master control key Key1, Key2 ... Keyn and hash summary Tag and Tag1, Tag2 ... Tagn with deciphering chip operating system mask on deciphering chip ROM;
E. deciphering chip electrification reset; Deciphering chip scanning master control key Key1, Key2 ... Keyn and hash summary Tag1, Tag2 ... Tagn calculates summary Tag '=hash (Key1+Key2+ ... + Keyn+Tag1+Tag2+ ... + Tagn), and judge whether Tag ' equates with Tag; If it is unequal; Deciphering chip is interrupt operation by force, gets into the locked protection of deciphering chip, and deciphering chip is not receiving and sending any data and signal; Then get into next step if equate;
F. a kind of cryptographic algorithm of digital television conditional access system developer initialization, and injection cryptographic algorithm district implements access control according to the level of security that chip exterior not can read and can write; The whole working keys and the authenticate key that inject this kind cryptographic algorithm are simultaneously implemented access control to the sensitive data district according to the level of security that chip exterior not can read and can not write;
G. calculate the hash summary of above-mentioned cryptographic algorithm and whole working keys, obtain TagSecrity, be kept at the sensitive data district, implement access control according to the level of security that chip exterior not can read and can not write;
H. each deciphering chip electrification reset, the cryptographic algorithm of deciphering chip scanning deciphering chip and whole working keys calculate the hash summary; Obtain TagSecrity '; And judge whether TagSecrity ' equates with TagSecrity, if unequal, then deciphering chip interrupt operation by force; Get into the locked protection of deciphering chip, deciphering chip is not receiving and is sending any data and signal; Then get into next step if equate;
I. digital-tv operator upgrading deciphering chip cryptographic algorithm and working key; Configuration data is to the n kind; Operator is encrypted to the encrypt data bag with cryptographic algorithm and working key and configuration data with master control key Keyn; Extended byte broadcast mode through digital television conditional access system ECM packet is handed down to receiving terminal, sends the hash summary of cryptographic algorithm, the hash summary of working key and the hash summary Tagn of master control key Keyn and each supplementary simultaneously and gives receiving terminal;
J. after receiving terminal receives upgrading message; The notice deciphering chip carries out the safety upgrade authentication, and after authentication was passed through, receiving terminal was transferred to deciphering chip with the encrypt data bag; And destroy the encrypt data bag on the receiving terminal simultaneously; After the encrypt data bag is destroyed at the terminal, the summary of cryptographic algorithm, the summary of working key and the hash summary Tagn of master control key Keyn and each supplementary are transferred to deciphering chip, and destroy the above-mentioned summary on the receiving terminal simultaneously;
K. deciphering chip is temporarily stored in the encrypt data bag that receives among the RAM; Behind the hash summary Tagn of the hash summary that receives the hash summary of cryptographic algorithm, working key and master control key Keyn and each supplementary; Choose the hash summary Tagn of master control key Keyn and each supplementary; Take out master control key Keyn with the master control key pairing in ROM district, and untie the encrypt data bag among the RAM with the cryptographic algorithm of master control key Keyn and current deciphering chip;
L. deciphering chip extracts cryptographic algorithm and working key respectively from the encrypt data bag of untiing; Configuration data; And the hash that calculates cryptographic algorithm makes a summary and the hash summary of working key; Whether the hash summary of hash summary and working key of hash summary and the cryptographic algorithm that receives of hash summary and working key of judging the cryptographic algorithm calculate is identical, as if inequality, and then deciphering chip interrupt operation by force; Get into the locked protection of deciphering chip, deciphering chip is not receiving and is sending any data and signal; If identical cryptographic algorithm district and the sensitive data district that then cryptographic algorithm and working key is updated to EEPROM respectively; Key algorithm and the working key of destroying legacy version simultaneously recomputate the hash summary with cryptographic algorithm and the synthetic packet of working key again; Obtain TagSecrity; Be kept at the sensitive data district, destroy the TagSecrity of legacy version simultaneously, and get into next step;
M. deciphering chip is to the sensitive data district, and the cryptographic algorithm district implement control according to level of security that not can read and can not write and the level of security that not can read and can write respectively, and the upgrading of notice receiving terminal is accomplished;
N. receiving terminal carries out power-off reset operation to deciphering chip, behind the deciphering chip power-off reset, according to new password algorithm and working key and configuration data carry out new safeguard protection and add, the decrypted key data manipulation, this safety upgrade completion.
The invention has the beneficial effects as follows, can make deciphering chip of conditional access system of digital TV carry out safety upgrade, saved the cost of changing smart card or chip through digital TV network through above-mentioned steps.
Embodiment
Below in conjunction with embodiment, describe technical scheme of the present invention in detail.
The invention provides a kind of method for updating deciphering chip of conditional access system of digital TV; At first operator is divided into sensitive data district, cryptographic algorithm district and general data district with the EEPROM of deciphering chip; And the enforcement access control is set respectively; The sensitive data district is set to chip exterior and does not can read and can not write; The cryptographic algorithm district is set to chip exterior and does not can read and can write; The general data district is set to chip exterior and can reads and can write; The digital television conditional access system developer generates master control key Key1, the Key2 of the various algorithms of safeguard protection dynamic update ... Keyn adds summary Tag, Tag1, Tag2 ... Tagn with deciphering chip operating system mask on crypto chip ROM, and by certain security mechanism strict protection master control key Key1, Key2 ... Keyn and summary Tag1, Tag2 ... The secret of Tagn and integrality; And the dynamic update mechanism of structure deciphering chip of conditional access system of digital TV safeguard protection core; Make digital TV terminal deciphering chip can upgrade safely, quickly new cryptographic algorithm, working key, configuration data, safety is destroyed Old Password algorithm, working key, configuration data simultaneously, thus realize deciphering chip safe, fast, safety upgrade dynamically.
Embodiment
Each supplementary of this example comprises condition receiving system developer title, deciphering chip operating system mask batch number and mask time etc.
At first the EEPROM with deciphering chip is divided into sensitive data district, cryptographic algorithm district and general data district; And the enforcement access control is set respectively, and the sensitive data district is set to chip exterior and does not can read and can not write, and the cryptographic algorithm district is set to chip exterior and does not can read and can write; The general data district is set to chip exterior and can reads and can write; The digital television conditional access system developer generates various algorithm master control key Key1, the Key2 of safeguard protection dynamic update then ... Keyn, and constitute an information packet with each supplementary, information packet is done the hash summary; Generate Tag1, Tag2 ... Tagn; Be Tagn=hash (Keyn+message), again with various algorithm master control key Key1, Key2 ... Keyn and hash summary Tag1, Tag2 ... Tagn forms a master control key packet, and the master control key packet is done the hash summary; Generate Tag; Be Tag=hash (Key1+Key2+ ... + Keyn+Tag1+Tag2+ ... + Tagn), and with various algorithm master control key Key1, Key2 ... Keyn and summary Tag, Tag1, Tag2 ... Tagn with deciphering chip operating system mask on deciphering chip ROM; When the deciphering chip electrification reset; Deciphering chip scanning master control key Key1, Key2 ... Keyn and hash summary Tag1, Tag2 ... Tagn calculates summary Tag '=hash (Key1+Key2+ ... + Keyn+Tag1+Tag2+ ... + Tagn), and judge whether Tag ' equates with Tag; If unequal then deciphering chip interrupt operation by force; Get into the locked protection of deciphering chip, deciphering chip is not receiving and is sending any data and signal, strict protection master control key Key1, Key2 ... Keyn and summary Tag1, Tag2 ... The secret of Tagn and integrality; A kind of cryptographic algorithm of digital television conditional access system developer initialization (Algorithm), and inject the cryptographic algorithm district, implement access control according to the level of security that chip exterior not can read and can write; The whole working keys and the authenticate key that inject this kind cryptographic algorithm simultaneously are to the sensitive data district; Level of security according to chip exterior not can read and can not write is implemented access control; And the hash that calculates above-mentioned cryptographic algorithm and whole working keys makes a summary; Obtain TagSecrity, it is kept at the sensitive data district, implement access control according to the level of security that chip exterior not can read and can not write.During each deciphering chip electrification reset, the cryptographic algorithm of deciphering chip scanning deciphering chip and whole working keys calculate the hash summary; Obtain TagSecrity ', and judge whether TagSecrity ' equates with TagSecrity, if unequal; Then deciphering chip interrupt operation by force; Get into the locked protection of deciphering chip, deciphering chip is not receiving and is sending any data and signal, the integrality of the secret of strict protection working key and authenticate key and integrality and cryptographic algorithm.When digital-tv operator upgrading deciphering chip cryptographic algorithm and working key; Configuration data is to the n kind; Then operator is encrypted to the encrypt data bag with cryptographic algorithm (Algorithmn) and working key (Task Keyn) and configuration data (Confign) with master control key Keyn; Extended byte broadcast mode through digital television conditional access system ECM packet is handed down to receiving terminal; Send the hash summary (Algorithmn Tag) of cryptographic algorithm, the hash summary (Task Keyn Tag) of working key and the hash summary Tagn of master control key Keyn and each supplementary simultaneously and give receiving terminal; After receiving terminal receives upgrading message; The notice deciphering chip carries out the safety upgrade authentication, and after authentication was passed through, receiving terminal was transferred to deciphering chip with the encrypt data bag; And destroy the encrypt data bag on the receiving terminal simultaneously; After the encrypt data bag is destroyed at the terminal, the hash summary (Algorithmn Tag) of cryptographic algorithm, the hash summary (Task Keyn Tag) of working key and the hash summary Tagn of master control key Keyn and each supplementary are transferred to deciphering chip, and destroy the above-mentioned summary on the receiving terminal simultaneously; Deciphering chip is temporarily stored in the encrypt data bag that receives among the RAM; Behind the hash of the hash summary (Task Keyn Tag) that receives the hash summary (Algorithmn Tag) of cryptographic algorithm, working key and master control key Keyn and each supplementary summary Tagn, choose hash summary Tagn, take out master control key Keyn with the master control key pairing in ROM district; And untie the encrypt data bag among the RAM with the cryptographic algorithm of master control key Keyn and current deciphering chip; Deciphering chip extracts cryptographic algorithm (Algorithmn) and working key (Task Keyn) respectively from the encrypt data bag of untiing, configuration data (Confign), and calculate the hash summary (Algorithmn Tag ') of cryptographic algorithm (Algorithmn) and the hash summary (Task Keyn Tag ') of working key (Task Keyn); The judgement summary judges that the hash of the cryptographic algorithm that calculates makes a summary (Algorithmn Tag ') and the hash summary (Task Keyn Tag ') of working key is made a summary (Algorithmn Tag) with the hash of the cryptographic algorithm that receives and whether the hash summary (Task Keyn Tag) of working key is identical; If inequality, then deciphering chip interrupt operation by force gets into the locked protection of deciphering chip; Deciphering chip is not receiving and is sending any data and signal, the integrality of the secret of strict protection working key and authenticate key and integrality and cryptographic algorithm; If identical cryptographic algorithm district and the sensitive data district that then cryptographic algorithm (Algorithmn) and working key (Task Keyn) is updated to EEPROM respectively; Key algorithm and the working key of destroying legacy version simultaneously recomputate the hash summary with cryptographic algorithm (Algorithmn) and the synthetic packet of working key (Task Keyn) again; Obtain TagSecrity, be kept at the sensitive data district, destroy the TagSecrity of legacy version simultaneously; Last deciphering chip is to the sensitive data district; The cryptographic algorithm district implements control according to level of security that not can read and can not write and the level of security that not can read and can write respectively, and the upgrading of notice receiving terminal is accomplished; The power-off reset operation is carried out to deciphering chip in the terminal; Behind the deciphering chip power-off reset, according to new password algorithm (Algorithmn) and working key (Task Keyn) and configuration data (Confign) carry out new safeguard protection and add, the decrypted key data manipulation, this safety upgrade is accomplished.
Claims (1)
1. method for updating deciphering chip of conditional access system of digital TV is characterized in that, may further comprise the steps:
A. the EEPROM with deciphering chip is divided into sensitive data district, cryptographic algorithm district and general data district; And the enforcement access control is set respectively; The sensitive data district is set to chip exterior and does not can read and can not write; The cryptographic algorithm district is set to chip exterior and does not can read and can write, and the general data district is set to chip exterior and can reads and can write;
B. the digital television conditional access system developer generates various algorithm master control key Key1, the Key2 of safeguard protection dynamic update ... Keyn; And constitute an information packet with each supplementary, and information packet is done the hash summary, generate Tag1, Tag2 ... Tagn; Be Tagn=hash (Keyn+message); Wherein, message representes each supplementary, and said each supplementary comprises condition receiving system developer title, deciphering chip operating system mask batch number and mask time;
C. with various algorithm master control key Key1, Key2 ... Keyn and hash summary Tag1, Tag2 ... Tagn forms a master control key packet; The master control key packet is done the hash summary; Generate Tag, i.e. Tag=hash (Key1+Key2+ ... + Keyn+Tag1+Tag2+ ... + Tagn);
D. with various algorithm master control key Key1, Key2 ... Keyn and hash summary Tag and Tag1, Tag2 ... Tagn with deciphering chip operating system mask on deciphering chip ROM;
E. deciphering chip electrification reset; Deciphering chip scanning master control key Key1, Key2 ... Keyn and hash summary Tag1, Tag2 ... Tagn calculates summary Tag '=hash (Key1+Key2+ ... + Keyn+Tag1+Tag2+ ... + Tagn), and judge whether Tag ' equates with Tag; If it is unequal; Deciphering chip is interrupt operation by force, gets into the locked protection of deciphering chip, and deciphering chip is not receiving and sending any data and signal; Then get into next step if equate;
F. a kind of cryptographic algorithm of digital television conditional access system developer initialization, and injection cryptographic algorithm district implements access control according to the level of security that chip exterior not can read and can write; The whole working keys and the authenticate key that inject this kind cryptographic algorithm are simultaneously implemented access control to the sensitive data district according to the level of security that chip exterior not can read and can not write;
G. calculate the hash summary of above-mentioned cryptographic algorithm and whole working keys, obtain TagSecrity, be kept at the sensitive data district, implement access control according to the level of security that chip exterior not can read and can not write;
H. each deciphering chip electrification reset, the cryptographic algorithm of deciphering chip scanning deciphering chip and whole working keys calculate the hash summary; Obtain TagSecrity '; And judge whether TagSecrity ' equates with TagSecrity, if unequal, then deciphering chip interrupt operation by force; Get into the locked protection of deciphering chip, deciphering chip is not receiving and is sending any data and signal; Then get into next step if equate;
I. digital-tv operator upgrading deciphering chip cryptographic algorithm and working key; Configuration data is to the n kind; Operator is encrypted to the encrypt data bag with cryptographic algorithm and working key and configuration data with master control key Keyn; Extended byte broadcast mode through digital television conditional access system ECM packet is handed down to receiving terminal, sends the hash summary of cryptographic algorithm, the hash summary of working key and the hash summary Tagn of master control key Keyn and each supplementary simultaneously and gives receiving terminal;
J. after receiving terminal receives upgrading message; The notice deciphering chip carries out the safety upgrade authentication, and after authentication was passed through, receiving terminal was transferred to deciphering chip with the encrypt data bag; And destroy the encrypt data bag on the receiving terminal simultaneously; After the encrypt data bag is destroyed at the terminal, the summary of cryptographic algorithm, the summary of working key and the hash summary Tagn of master control key Keyn and each supplementary are transferred to deciphering chip, and destroy the above-mentioned summary on the receiving terminal simultaneously;
K. deciphering chip is temporarily stored in the encrypt data bag that receives among the RAM; Behind the hash summary Tagn of the hash summary that receives the hash summary of cryptographic algorithm, working key and master control key Keyn and each supplementary; Choose the hash summary Tagn of master control key Keyn and each supplementary; Take out master control key Keyn with the master control key pairing in ROM district, and untie the encrypt data bag among the RAM with the cryptographic algorithm of master control key Keyn and current deciphering chip;
L. deciphering chip extracts cryptographic algorithm and working key respectively from the encrypt data bag of untiing; Configuration data; And the hash that calculates cryptographic algorithm makes a summary and the hash summary of working key; Whether the hash summary of hash summary and working key of hash summary and the cryptographic algorithm that receives of hash summary and working key of judging the cryptographic algorithm calculate is identical, as if inequality, and then deciphering chip interrupt operation by force; Get into the locked protection of deciphering chip, deciphering chip is not receiving and is sending any data and signal; If identical cryptographic algorithm district and the sensitive data district that then cryptographic algorithm and working key is updated to EEPROM respectively; Key algorithm and the working key of destroying legacy version simultaneously recomputate the hash summary with cryptographic algorithm and the synthetic packet of working key again; Obtain TagSecrity; Be kept at the sensitive data district, destroy the TagSecrity of legacy version simultaneously, and get into next step;
M. deciphering chip is to the sensitive data district, and the cryptographic algorithm district implement control according to level of security that not can read and can not write and the level of security that not can read and can write respectively, and the upgrading of notice receiving terminal is accomplished;
N. receiving terminal carries out power-off reset operation to deciphering chip, behind the deciphering chip power-off reset, according to new password algorithm and working key and configuration data carry out new safeguard protection and add, the decrypted key data manipulation, this safety upgrade completion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910309279A CN101699859B (en) | 2009-11-04 | 2009-11-04 | Method for upgrading deciphering chip of conditional access system of digital TV |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910309279A CN101699859B (en) | 2009-11-04 | 2009-11-04 | Method for upgrading deciphering chip of conditional access system of digital TV |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101699859A CN101699859A (en) | 2010-04-28 |
| CN101699859B true CN101699859B (en) | 2012-09-12 |
Family
ID=42148299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910309279A Active CN101699859B (en) | 2009-11-04 | 2009-11-04 | Method for upgrading deciphering chip of conditional access system of digital TV |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101699859B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102082971B (en) * | 2011-02-10 | 2013-05-01 | 武汉天喻信息产业股份有限公司 | Digital TV set top box (STB) chip and entitle receiving method adopting same |
| CN104575609B (en) * | 2013-10-25 | 2019-06-28 | 上海华力创通半导体有限公司 | Chip identifier reading/writing method in OTP register |
| CN103596011B (en) * | 2013-11-20 | 2017-07-04 | 北京中星微电子有限公司 | The storage processing method and device of view data |
| CN105354059A (en) * | 2015-10-29 | 2016-02-24 | 珠海格力电器股份有限公司 | Upgrade method and apparatus for controller of air-conditioner system |
| CN109150840B (en) * | 2018-07-25 | 2021-04-20 | 重庆邮电大学 | Self-adaptive tamper-proof data structure and method for update package in Internet of vehicles |
| CN111400725A (en) * | 2019-01-03 | 2020-07-10 | 西安中车永电捷通电气有限公司 | Method for preventing chip from locking, chip and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101193197A (en) * | 2006-12-01 | 2008-06-04 | 北京东方广视科技有限责任公司 | Online upgrade method for smart card |
| CN101399662A (en) * | 2008-09-27 | 2009-04-01 | 北京创毅视讯科技有限公司 | Method, system, conditional receiving module and customer terminal for obtaining service key |
| CN101505402A (en) * | 2009-03-06 | 2009-08-12 | 四川长虹电器股份有限公司 | Authentication method for uni-directional network digital television conditional receiving system terminal deciphering module |
| CN101562521A (en) * | 2009-05-27 | 2009-10-21 | 四川长虹电器股份有限公司 | Key updating method |
-
2009
- 2009-11-04 CN CN200910309279A patent/CN101699859B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101193197A (en) * | 2006-12-01 | 2008-06-04 | 北京东方广视科技有限责任公司 | Online upgrade method for smart card |
| CN101399662A (en) * | 2008-09-27 | 2009-04-01 | 北京创毅视讯科技有限公司 | Method, system, conditional receiving module and customer terminal for obtaining service key |
| CN101505402A (en) * | 2009-03-06 | 2009-08-12 | 四川长虹电器股份有限公司 | Authentication method for uni-directional network digital television conditional receiving system terminal deciphering module |
| CN101562521A (en) * | 2009-05-27 | 2009-10-21 | 四川长虹电器股份有限公司 | Key updating method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101699859A (en) | 2010-04-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102160325B (en) | Simulcrypt key sharing with hashed keys | |
| CN1820482B (en) | Method for generating and managing a local area network | |
| CN100592683C (en) | Protected return path from digital rights management dongle | |
| CN101699859B (en) | Method for upgrading deciphering chip of conditional access system of digital TV | |
| CN101263714A (en) | Method for verifying a target device connected to a master device | |
| KR101366277B1 (en) | Method and terminal for verifying membership in order to move rights object in domain | |
| CN101375309B (en) | Method and apparatus for temporarily using DRM contents | |
| US20140237260A1 (en) | Telecommunications device security | |
| US20120079279A1 (en) | Generation of SW Encryption Key During Silicon Manufacturing Process | |
| KR100969668B1 (en) | Method for Downloading CAS in IPTV | |
| JP4976135B2 (en) | Limited access method and limited access apparatus | |
| CN100471110C (en) | Method and apparatus for managing digital rights using portable storage device | |
| CN111295654A (en) | Method and system for securely transferring data | |
| EP1932275B1 (en) | Security device and building block functions | |
| CN104868998A (en) | System, Device, And Method Of Provisioning Cryptographic Data To Electronic Devices | |
| WO2015045172A1 (en) | Information processing device and information processing method | |
| US20130124864A1 (en) | Method for importing rights object and rights issuer | |
| KR101461945B1 (en) | Domain upgrade method in digital right management | |
| US7869793B2 (en) | Method and apparatus for preventing unauthorized use of mobile terminal | |
| US20110078444A1 (en) | Re-authentication apparatus and method in downloadable conditional access system | |
| US20120051540A1 (en) | Conditional access system and method of using conditional access image | |
| CN101902610B (en) | Method for realizing secure communication between IPTV set top box and smart card | |
| CN100440884C (en) | Local digital network, methods for installing new devices and data broadcast and reception methods in such a network | |
| EP2990979B1 (en) | Replay attack prevention for content streaming system | |
| CN101089865B (en) | Method, device and system for field grant transfer |
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 | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160414 Address after: 621000 Mianyang province high tech Zone, East Hing Road, No. 35 cotton Patentee after: Sichuan Changhong Electrical Appliance Co., Ltd. Address before: 1009, room 8, building 610041, high tech incubator Park, South Tianfu Road, Tianfu Road, Chengdu hi tech Zone, Sichuan Patentee before: Panovasic Co., Ltd. |