改进Rossler方程的异变混沌堆混合加解密系统

Hybrid Encryption and Decryption System of Mutated Chaotic Stack Based on Improved Rossler Equation

对称加密算法是混合加密通信过程中的子算法,通常结合两端对称的加密密钥序列使用.针对已有某些对称加密算法存在的密钥较短、易产生弱密钥以及加密文件后空间占用增加等问题,改进Rossler混沌系统设计了异变混沌堆加密算法,配合非对称加密实现了一套混合加密系统.该系统加密文件用时、空间占用都优于AES算法.通过仿真给出混沌系统在不同相态微调情况下的加密序列效果数据,证明了加密算法具有可靠性、安全性,对亿分之一精度的密钥微调极其敏感;面对传输过程噪声影响时鲁棒性良好.

Symmetric encryption algorithm is a sub algorithm in the process of mixed encryption communication,w hich is usually used in combination with symmetric encryption key sequence at both ends.In order to solve the problems of short key,easy to generate weak key and increase the space occupation after encrypting files in some existing symmetric encryption algorithms,a hybrid encryption system is designed by improving Rossler chaotic system and combining with asymmetric encryption.This system is better than AES in speed and space usage.The simulation results show that the encryption algorithm has reliability and security,and is very sensitive to the one millionth accuracy of the key fine-tuning,and has good robustness in the face of the transmission process noise.