基于参数跳动和扰动的混沌保密系统的理论设计

The Theoretical Design of Chaotic Cryptosystem Based on Parameter Change and Perturbation

提出一种基于参数跳动和扰动的混沌保密方法.通过随机改变混沌映射的参数来提高混沌映射的复杂性;同时在有限精度实现时,通过引入随机扰动序列使得输出的混沌序列具有良好的自相关性、均匀分布特性和随机统计特性等.理论研究和模拟结果表明,该混沌序列加密方法具有较好的保密性并且便于软硬件实现.

A new chaotic cryptosystem based on parameter change and perturbation was proposed. The complexity and sensitivity of the system were improved. Random sequence was introduced to disturb stream key and extend the length of period. The generated chaotic sequence has self-correction uniform distribution and random statistical property. The computer simulation results show that the sequence has good cryptography property.