Vehicle-mounted DVB (Digital Video Broadcasting) conditional access system for identifying set-top-box identity
A conditional access system, set-top box technology, applied in electrical components, image communication, selective content distribution, etc., can solve problems affecting the economic interests of digital TV operators, cracking and other issues
Inactive Publication Date: 2013-08-07
WUXI BEIDOUXINGTONG INFORMATION TECH
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Problems solved by technology
[0005] In order to solve the above problems, the present invention provides a vehicle-mounted DVB conditional access system for identifying the identity of a set-top box, and integrates a multi-layer password in the smart card of the vehicle-mounted DVB conditional access system with simple structure and single function and the set-top box corresponding to the smart card Management and set-top box identity verification functions, on the one hand, paying users can normally watch digital TV program content, on the other hand, improve the security of smart cards and set-top boxes, and prevent criminals from taking advantage of the encryption defects of the original conditional access system to crack to The scrambling password of the scrambled program affects the economic interests of digital TV operators
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[0014] The embodiment of the vehicle-mounted DVB conditional access system for identifying the identity of the set-top box of the present invention will be described in detail below with reference to the accompanying drawings.
[0015] figure 1A structural block diagram of a vehicle-mounted DVB conditional access system for identifying the identity of a set-top box is shown according to an embodiment of the present invention. Wherein the vehicle-mounted DVB conditional access system that provides digital TV conditional access services for car users includes a smart card and a set-top box corresponding to the smart card, the smart card sends a pseudo-random stream to the set-top box, and the set-top box uses the internally stored The terminal key of the set-top box encrypts the received pseudo-random stream to obtain a first encrypted pseudo-random stream, and outputs the first encrypted pseudo-random stream and the set-top box number of the set-top box stored inside the set-to...
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The invention relates to a vehicle-mounted DVB (Digital Video Broadcasting) conditional access system for identifying a set-top-box identity. The vehicle-mounted DVB conditional access system comprises a smart card and a set top box corresponding to the smart card, wherein the smart card sends a pseudo random stream to the set top box, and obtains and outputs an encrypted first encryption pseudo random stream; the smart card decrypts and searches a terminal secret key corresponding to a set-top-box number of the set top box in internal encrypted stored set-top-box information according to the received set-top-box number sent by the set top box, and utilizes the searched terminal secret key to encrypt the pseudo random stream to obtain a second encryption pseudo random stream; and the first encryption pseudo random stream is compared with the second encryption pseudo random stream, if the two random streams are the same, decryption and descramble of the programs are started. Through the invention, the safe DVB conditional access system is provided, so that a personal secret key PDK (Plug Development Kit) of the smart card user cannot be decoded easily, and meanwhile, multiple set-top-box identities inserted by the smart card can be identified.
Description
technical field [0001] The invention relates to the field of vehicle-mounted DVB conditional access, in particular to a vehicle-mounted DVB conditional access system for identifying the identity of a set-top box. Background technique [0002] With the development of science and technology and the improvement of people's living standards, people's requirements for TV viewing have shifted from fixed viewing to mobile viewing, and the requirements for TV content are also getting higher and higher. For car passengers, watching car TV to pass the free time of long-distance travel has become a widespread phenomenon, and car TV products have also developed accordingly. The current car TV transmission standards are mainly DVB and ATSC. DVB is used in more countries and has a wider range of applications. Car TV mainly transmits content through DVB’s terrestrial transmission method, namely DVB-T, which can be provided for different users. For different services, for some high-end TV ...
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IPC IPC(8): H04N21/414H04N21/4367
Inventor 不公告发明人
Owner WUXI BEIDOUXINGTONG INFORMATION TECH