Encryption and decryption method based on embedded Linux system

Abstract

The invention discloses an encryption and decryption method based on an embedded Linux system, and belongs to the technical field of computer software. The method includes adding an encryption function definition and an implementation code into a system call file of a Linux kernel code; adding an encryption function statement into a system call function list of a corresponding kernel code of a processor; recompiling and re-solidifying the kernel code; calling an encryption function to encrypt in application software according to the function statement. According to the method, through encryption and decryption codes of a system call kernel, an encryption and decryption coexisting mode correlated with the kernel is realized, data decryption difficulty is increased, and safety of codes and data is improved. Meanwhile, complexity of application software with the embedded Linux kernel code is lowered, and same encryption and decryption functions can be applied to different application software.

Description

technical field [0001] The invention belongs to the field of automobiles, and more specifically relates to an encryption and decryption method based on an embedded Linux system. Background technique [0002] As computer technology has been widely used around the world, it has provided great convenience for enterprises or individual users to work. However, in the process of computer popularization, it also faces many security risks. Users have caused huge losses. Under the background of the information age, mastering various encryption and decryption methods is an effective measure to ensure data security. With the rapid development of electronic technology, embedded devices are becoming more and more prosperous, and various encryption and decryption methods have also been deeply developed in the embedded field. [0003] Among the existing encryption and decryption methods, the more famous ones are MD5 (Message-Digest Algorithm5), RSA, etc., and there are many symmetric algo...

AI Technical Summary

Problems solved by technology

But existing encryption, decryption method are relatively easy to realize in Windows system, have following shortcoming when being applied to embedded system field:

[0004] (1) Various encryption and decryption methods are relatively complicated, and it is difficult to implement without very professional auxiliary tools;

[0005] (2) The encryption and decryption methods cannot be put together (that is, the data is encrypted in the code and decrypted in the same code), and the security is not guaranteed

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