Safe access method and device for digital broadcast television network

Abstract

The present invention discloses safe access method and device for digital broadcast television network. The method includes: establishing interactive digital broadcast television system; performing interactive user access network confirmation of the terminal part with the user access protocol of the interactive network while turning on the terminal; performing the user access system confirmation of the terminal part based on the user information; and accessing the terminal passing through the confirmation into digital broadcast television system. The safe access device has front end part including recombiner, scrambler, control word generator and service management control unit; and terminal part including decombiner, descrambler and interactive service processing unit. The present invention also discloses corresponding front end device and back end device. The present invention overcomes the demerit of relying cipher key alone with poor safety and is simple in structure, easy to realize and easy in system control.

Description

technical field [0001] The invention relates to the access technology of the broadcast television network, in particular to a method and device for safely accessing the digital broadcast television network. Background technique [0002] Most of the current radio and television networks ignore security issues at the initial stage of construction. Even if security issues are considered, the security mechanism is only based on the physical security mechanism. It is useless to say. For example: the cable TV network and satellite TV network in some areas have been illegally attacked, and people's normal viewing has been disturbed or interrupted, which has caused great damage to the TV network, brought huge economic losses, and even caused extremely bad social impact . Therefore, logical measures, such as security protocols, cryptography, and security management, are necessary and should be adopted to strengthen access authentication and prevent illegal user intrusion. [0003]...

AI Technical Summary

Problems solved by technology

[0011] It can be seen from the existing CA system user access authentication and service authorization scheme described above that the CA system is limited by the one-way network, which makes the scheme not only complicated, but also has some disadvantages in terms of security:

[0012] 1. Its security relies heavily on the capabilities of the terminal. Once the algorithm is cracked, any place within the system's scope of action will be completely exposed to the threat of stolen solutions

[0013] 2. The existing CA system cannot authenticate specific business authorization, so it is difficult to

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