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Method and device for realizing on-demand authorization of CAS terminal

A terminal and terminal identification technology, applied in image communication, selective content distribution, electrical components, etc., can solve the problem of authorization information occupying a large bandwidth and so on

Active Publication Date: 2021-11-30
SHENZHEN SDMC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to provide a method, device and computer-readable storage medium for realizing on-demand authorization of CAS terminals. The problem of information taking up a lot of bandwidth

Method used

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  • Method and device for realizing on-demand authorization of CAS terminal
  • Method and device for realizing on-demand authorization of CAS terminal
  • Method and device for realizing on-demand authorization of CAS terminal

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Embodiment Construction

[0033] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0034] The main solution of the embodiment of the present invention is: receive the authorization request sent by the CAS terminal, and obtain the CAS terminal identification corresponding to the authorization request; determine the authorization information corresponding to the CAS terminal identification according to the CAS terminal identification; The hypertext transfer protocol http interface sends the authorization information to the CAS terminal that sends the authorization request, wherein the authorization information includes an encrypted service key for the CAS terminal to obtain and control word, and then descramble the received scrambled program stream according to the control word.

[0035] Such as figure 1 as shown, figure 1 It is a schematic structural diagram of a digital TV conditional access syste...

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Abstract

The invention discloses a method for realizing on-demand authorization of a CAS terminal, and the method comprises the steps: receiving an authorization request sent by the CAS terminal, and obtaining a CAS terminal identifier corresponding to the authorization request; determining authorization information corresponding to the CAS terminal identifier according to the CAS terminal identifier; sending the authorization information to the CAS terminal sending the authorization request through a preset hypertext transfer protocol (http) interface, wherein the authorization information comprises an encrypted service secret key, so that the CAS terminal obtains a control word according to the service secret key, and the received scrambled program stream is descrambled according to the control word. The invention also discloses a device for realizing on-demand authorization of the CAS terminal and a computer readable storage medium. According to the invention, the authorization request sent by the CAS terminal is received, and then the authorization information is sent to the CAS terminal in a unicast manner, so that the problem that the authorization information occupies a large amount of bandwidth when the authorization information is broadcasted to all the CAS terminals in a one-way manner is solved.

Description

technical field [0001] The invention relates to the technical field of digital television, in particular to a method, a device and a computer-readable storage medium for realizing on-demand authorization of a CAS terminal. Background technique [0002] The conditional access system CAS (Conditional Access System) is the core technology of pay digital TV broadcasting. Its main function is to prevent illegal intrusion into the digital broadcasting network, and allow authorized users to watch specific programs while preventing unauthorized users from watching them. The basic principle of CAS authorization is: the scrambler of the CAS front-end system provides the scramble control word CW (Control Word) secret key for scrambling the program stream to the authorization control information generator ECMG (Entitlement Control Message Generator), and ECMG sends the CW (Entitlement Control Message Generator) Encapsulate it into entitlement control information ECM (Entitlement Control...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/6334H04N21/254H04N21/266H04N21/4623H04N21/4627H04N21/475H04N21/2543H04N21/418
CPCH04N21/6334H04N21/4623H04N21/4627H04N21/2541H04N21/26606H04N21/4753H04N21/2543H04N21/4181
Inventor 韦月飞陆天钦张灵晶李波严志康
Owner SHENZHEN SDMC TECH CO LTD
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