一种数字混沌加密系统的嵌入式仿真实现

A design of digital chaotic encryption embedded system

海上舰船之间以及舰船与控制中心之间通信的加密及解密事关整个海战成败。本文对用于海上舰船通信加密系统中热门Baptista混沌加密算法进行了系统研究,分析在实际舰船通信系统中实现的利弊。针对Baptista算法在产生的混沌加密信号出现的周期规律性以及动力衰退性弊端,改进此算法,提出一种加强型控制位混沌加密算法。此算法通过增加控制位对混沌加密明文进行自适应控制,使其不规律改变混沌系统运行轨迹,克服Baptista算法的周期性以及动力衰退性。最后设计基于此算法的FPGA仿真系统,对其进行验证。

This paper first research chaotic encryption algorithm,especially Baptista algorithm using in marine wireless communication,and analyze the advantages and disadvantages of it. For the lower bound of expectation of the cipher-to-plaint,this paper propose a chaotic encryption algorithm based on control bit. The algorithm control the iteration process by control bit and change the trajectory of chaotic encryption algorithm. At last,design one marine chaotic encryption embedded system based on FPGA and simulate. The simulation results show that this algorithm improve the performance of chaotic encryption system.