Automatic encrypting method and system for chip

An encryption method and chip technology, which can be used in program/content distribution protection, instruments, electrical digital data processing, etc., can solve the problems of increasing the cost of encrypted circuits or chips, and the circuit being cracked at the same time, so as to increase the operating burden and prevent infringement. Effect
CN104537320AInactive Publication Date: 2015-04-22深圳市雷赛软件技术有限公司 +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
深圳市雷赛软件技术有限公司
Publication Date
2015-04-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses automatic encrypting method and system for a chip. The automatic encrypting method and system for the chip are applied to the chip which can be written online and erased and of which the storage area can be divided into blocks. The method comprises the steps of reading information for generating a key from a special register of the chip when the chip is electrified to operate the program for the first time; operating the program code for actuating the key calculation function through the information to obtain the key for the chip; storing the operated key into the storage area of the chip to be used as a verification key for subsequent electrifying operation; automatically erasing the program code for actuating the key storage function in step b, wherein the program code for actuating the key storage function is pre-divided into independent storage areas can be erased online. With the adoption of the method and system, the chip can be encrypted with low cost and good effect.
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Description

technical field

[0001] The invention relates to a chip automatic encryption method and system. Background technique

[0002] At present, the protection of embedded chip software is mainly by adding an external encryption circuit or chip. The basic method is to add an additional key chip outside the main chip that needs to be encrypted. When working, the main chip reads the key from the key chip. for decryption. For small-capacity chip systems such as DSP, the cost of adding encryption circuits or chips is particularly prominent. Moreover, the solution using an encryption circuit or chip may also have the risk of two circuits being cracked at the same time. Contents of the invention

[0003] The main purpose of the present invention is to provide a chip automatic encryption method and system with low cost and good encryption effect in view of the deficiencies of the prior art.

[0004] To achieve the above object, the present invention adopts the following technical solu...

Claims

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