基于分数阶混沌系统的文本加解密算法及数字电路实现

Text Encryption and Decryption Algorithm Based on Fractional Chaotic System and Digital Circuit Implementation

21世纪是信息时代,信息安全备受关注。针对这一问题,本文提出了一种基于三维分数阶混沌系统的文本加解密算法。结合Grünwald-Letnikov导数定义,采用离散的数值解法构建了4个三维分数阶混沌模型。搭建好电路,在使用时随机选取1个分数阶混沌系统以产生混沌序列,并由此构造出密钥序列,再将发送端和接收端的文本信息与密钥序列进行异或处理来实现对文本的加解密,从而完成两个STM32之间的无线保密通信。测试结果表明,该算法具有良好的加密效果和安全性。

The 21st century is the information age,so information security has attracted much attention.Aiming at this problem,a text encryption and decryption algorithm based on three dimensional fractional chaotic system is proposed.Based on the definition of Grünwald-Letnikov derivative,four three dimensional fractional order chaotic models are constructed by discrete numerical method.After the circuit is built,a fractional-order chaotic system is randomly selected to generate a chaotic sequence during use,and the key series is constructed.Then the text information and the key series of the sender and receiver are XOR processed to realize the encryption and decryption of the text,so as to realize the wireless secure communication between the two STM32s.The test results show that the algorithm has good encryption effect and security.