Encryption and decryption method and system for embedded system programs

Abstract

The invention discloses an encryption and decryption method and system for embedded system programs. The method comprises steps as follows: listing an execution view of an executable program binary file according to the file format, and selecting a designated position, where encryption starts, of each structural module in the execution view; calculating the offset address of the encryption position of the selected structural module in the file according to execution view extraction information, and encrypting multiple bytes behind the designated position with an encryption algorithm; loading the encrypted file, adding the writing permission before mapping of a file code segment, and calculating the decryption position for decryption after mapping. The safety of user programs is improved and the legal rights and interests of the user are protected under the condition that the normal functions of the programs are not affected.

Description

technical field [0001] The invention relates to the technical field of software security, in particular to an encryption and decryption method and system for embedded system programs. Background technique [0002] In recent years, with the maturity of system control, communication, sensing and other technologies, embedded systems have been rapidly popularized in industries such as consumer electronics, automobiles, industrial control and communications. However, with the continuous development of hacking techniques such as decompilation and reverse engineering, embedded systems are facing more and more attacks, and pirated products emerge in endlessly. How to use low-cost, high-reliability methods in these embedded systems to protect the R&D and design results of enterprises or individuals from illegal plagiarism and plagiarism has become an important issue in the field of embedded product design. [0003] At present, the encryption of embedded products mostly uses encrypti...

AI Technical Summary

Problems solved by technology

[0004] Through this external encryption chip, although the program can be prevented from being illegally cracked to a certain extent, it requires additional hardware costs

And the embedded products it faces are mostly single-chip bare-metal programs, which are not suitable for Linux system applications

The most important thing is that most of the encryption chips currently on the market adopt the encryption method of comparative authentication, which still cannot avoid malicious modification of the authentication point by reverse engineering, resulting in the failure of program security.

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