Unlock instant, AI-driven research and patent intelligence for your innovation.

Conational access method, related device, 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: 2017-02-22
ALIBABA GRP HLDG LTD
View PDF4 Cites 4 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Conational access method, related device, and system
  • Conational access method, related device, and system
  • Conational access method, related device, and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The first embodiment of this application provides a conditional access method, such as figure 2 As shown, it is a schematic flowchart of the conditional access method described in the first embodiment of the application, and the conditional access method may include the following steps:

[0027] Step 201: The terminal device receives the key update information that contains the set root key generation parameters issued by the television transmission center.

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

[0029] Receiving EMM information issued by the television transmission center;

[0030] Use the original device identifier of the terminal device to find 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 ...

Embodiment 2

[0075] Based on the same inventive concept, the second embodiment of the present application provides a terminal device. For the specific implementation of the terminal device, please refer to the related description in the first method embodiment above, and the repetition will not be repeated, such as image 3 As shown, the terminal equipment may mainly include:

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

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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] This application relates to the technical field of digital television broadcasting, and 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 (Subscriber) receiving broadcast services or programs, that is, users can only watch authorized broadcast services or programs. The CA system is the key to the realization of personalized services. Its basic purpose is to perform authorization control and authorization management for users in the TV system of a TV station, so as to realize the paid service of the data broadcasting system. [0003] Specifically, such as figure 1 As shown, it is a schematic diagram of the basic principle architecture of the existing CA system. by figure 1 It can be seen that the CA system adopts a three-layer encryption method: the TV program sender uses Ks (descrambling key) to scramble the program...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/266H04N21/4623H04N21/6334
CPCH04N21/26613H04N21/4623H04N21/6334
Inventor 党茂昌
Owner ALIBABA GRP HLDG LTD