一种新的离散混沌同步保密通信方案  

Encryption approach to chaotic synchronization communication by TD-ERCS discrete system

作　　者：潘勃[1] 李骞[1] 冯金富[1] 徐建军[1] 李斌[1] 陶茜[1] 

机构地区：[1]空军工程大学工程学院,西安710038

出　　处：《计算机应用》2010年第1期198-202,共5页journal of Computer Applications

摘　　要：系统地分析了一种新的TD-ERCS离散混沌系统产生的伪随机序列的复杂性,仿真验证了TD-ERCS离散系统是复杂性稳定的全域性离散混沌系统。在此基础上,提出基于TD-ERCS离散系统构造伪随机序列的双信道保密通信方案。在该方案中,发送端利用混沌驱动器产生混沌密钥和遮掩信号,基于混沌的伪随机序列发生器(CPRNG)将驱动离散系统产生的混沌序列转化为加密密钥序列,并对信息信号先加密再遮掩。获得加密信号后使用一个信道传输,利用另一信道传输系统同步的单变量同步信号。理论分析和数值实验验证了该方案在密钥安全性和算法复杂性方面性能良好,且易于软件实现。The complexity of chaotic pseudo-random sequences generated by the new TD-ERCS discrete chaotic system was analyzed in detail, and the simulation results show that TD-ERCS is a discrete chaotic system with the great steady complexity. On the basis of this, the authors presented a double-channel encryption approach to generate chaotic pseudo- random sequences based on TD-ERCS discrete chaotic system. In this approach, the chaotic oscillator at the transmitter was used to generate digital key and masking signal, and chaotic sequence generated by the driver system was turned into eneryption keys in CPRNG. The information signals were first encrypted by the key and then masked by the masking signal. The masked signals were transmitted through one channel, the other channel was used to transmit the single variable which was coupled to the receiver to drive two chaotic oscillators to synchronize. The simulation results show that the theoretical analysis is in accordance with the experimental result. The cryptosystem is of higher level of security, synchronization and algorithm complexity, and it can be easily implemented by software.

关 键 词：相空间 混沌同步 Limpel—Ziv算法 Logistic迭代 遮掩信号 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术]