An anti-cracking method of single chip microcomputer code

Abstract

The invention relates to an anti-cracking method of code of a single chip microcomputer. According to the method, a protection program is embedded in the code of the single chip microcomputer with an EEROM function, data in an EEROM can be read for verification when the code of the single chip microcomputer is executed, the program can automatically determine whether the code is cracking code or original-factory code, if the code is the original-factory code, normal functions are executed, and if the code is the cracking code, a corresponding life countdown function is activated, a substrate is enabled to be ineffective after normal working for a while, thus a cracker suffers a painful cost for a cracking behavior, and cracking is eventually ineffective.

Description

technical field [0001] The invention belongs to the technical field of code protection of single-chip microcomputers, and in particular relates to an anti-cracking method of codes of single-chip microcomputers. Background technique [0002] The R&D investment of existing electronic products is getting bigger and bigger, and the iteration is getting faster and faster. Because of the lack of R&D investment and technology accumulation, many factories achieve the purpose of rapid mass production by copying hardware and cracking chip codes, which seriously damages the The fairness of the market has harmed the interests of R&D companies. [0003] At present, there are mainly two ways to crack the chip: non-intrusive and intrusive. Non-intrusive use of loopholes in chip design or programming sequence to crack chips. With the development of chip technology, such cases are rare at present. The intrusive way is to destroy the chip package, use semiconductor testing equipment and oth...

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