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A conditional access method and related equipment and system

A conditional access and terminal equipment technology, applied in electrical components, image communication, selective content distribution, etc., can solve the problem of low reception efficiency, achieve the effect of improving reception efficiency and application experience

Active Publication Date: 2020-01-24
ALIBABA GRP HLDG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The embodiment of this application provides a conditional access method and related equipment and system to solve the problems of low receiving efficiency in the existing CA system

Method used

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  • A conditional access method and related equipment and system
  • A conditional access method and related equipment and system
  • A conditional access method and related equipment and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1 of the present application provides a conditional access method, such as figure 2 As shown, it is a schematic flow chart of the conditional access method described in Embodiment 1 of the present application, and the conditional access method may include the following steps:

[0027] Step 201: The terminal device receives the key update information including the set root key generation parameters sent by the TV transmission center.

[0028] Optionally, the terminal device may receive the key update information containing the set root key generation parameters issued by the TV transmission center in the following manner:

[0029] receiving the EMM information issued by the TV transmitting center;

[0030] Use the original device identifier of the terminal device to find the information related to the terminal device itself from the EMM information, and find the information related to the terminal device itself based on the original root key pair of the term...

Embodiment 2

[0075] Based on the same inventive concept, Embodiment 2 of the present application provides a terminal device. For the specific implementation of the terminal device, please refer to the relevant description in Embodiment 1 of the above-mentioned method. image 3 As shown, the terminal equipment mainly includes:

[0076] The receiving module 31 can be used to receive the key update information containing the set root key generation parameters issued by the TV transmission center;

[0077] The update module 32 is configured to generate a new root key according to the root key generation parameters and a set key generation algorithm stored locally by the terminal device; wherein, the set key generation algorithm is determined by The device manufacturer related to the terminal device presets a private security algorithm in the secure storage area of ​​the terminal device; the root key generation parameter is an M-bit random number, and M is any positive integer, and , generatin...

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PUM

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Abstract

The invention discloses a conational access method, a related device, and a system. A terminal device is used to generate a new root key according to a root key generating parameter in key update information issued by a television emission center and a set key generating algorithm stored locally in the terminal device, and is used to acquire a descrambling key according to the new root key, and is used to descramble a program issued by the television emission center according to the acquired descrambling key to acquire a program clearing stream. A problem of a prior art that long time is required to update the device key to realize the program descrambling, when a user receives the program by using a conventional CA system is solved, and therefore the receiving efficiency of the CA system is improved, and the application experience of the user is improved.

Description

technical field [0001] The present application relates to the technical field of digital television broadcasting, in particular to a CA (Conational Access, Conditional Access) method and related equipment and systems. Background technique [0002] The CA system refers to a system used to control subscribers to receive broadcast services or programs, that is, subscribers can only watch authorized broadcast services or programs. The CA system is the key to realizing personalized service, and its basic purpose is to control and manage the authorization of users in the television system of the TV station, so as to realize the paid service of the data broadcasting system. [0003] Specifically, such as figure 1 As shown in , it is a schematic diagram of the basic principle architecture of the existing CA system. Depend on figure 1 It can be seen that the CA system adopts a three-layer encryption method: the TV program sender uses Ks (de-scrambling key) to scramble the program,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/266H04N21/4623H04N21/6334
CPCH04N21/26613H04N21/4623H04N21/6334
Inventor 党茂昌
Owner ALIBABA GRP HLDG LTD