Root key generation method, module, chip and receiving terminal of a conditional access system receiving end

Abstract

The invention discloses root key generation method of a conditional access system receiving terminal. The method comprises that Step 1, a root key generation module of a receiving terminal chip receives a root key generation parameter P provided by a manufacturer; and Step 2, the root key generation module generates a root key according to a preset root key derivation system and the parameter P, wherein the root key derivation system is provided by the chip manufacturer. By the aid of the method, the root key is not required to be embedded in the security chip at the receiving terminal, and the root key is generated through the root key derivation system embedded in the chip during operation, so that the root key or the condition receiving manufacturer can be replaced without replacing terminal devices.

Description

technical field [0001] The present invention relates to a conditional access system, in particular to a root key generation method in the conditional access system, a root key generation module, a chip including the root key generation module, and a receiving terminal including the chip. Background technique [0002] The conditional access system is the basis of digital TV operation fee management, and the premise and guarantee for the long-term stable development of the operator's business. The conditional access system is the basis of digital TV operation fee management, and the premise and guarantee for the long-term stable development of the operator's business. The conditional access system CAS includes: user management system SMS, service information generation system SIG, program management PMS / SI editing system, program scheduling processing EIS, user authorization management system SAS, conditional access CA, etc. It mainly includes two parts: one is SMS for managi...

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Problems solved by technology

[0004] In order to solve one of the problems of the above-mentioned existing conditional access system, the present invention proposes a root key generation method at the receiving end of the conditional access system. By presetting the root key derivation mechanism inside the chip, the root key can be generated during the operation of the terminal after deployment. Different root keys, so that the replacement of conditional access manufacturers and root keys can be completed without changing the receiving end equipment, and the root key is generated by providing parameters and mechanisms from multiple parties to ensure the security and security of the system and the root key. Neutrality, also proposes a root key generation module using the root key generation method and a chip including the root key generation module, and also proposes a receiving terminal including the chip

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