超混沌光载无线加密系统性能分析

Performance analysis of hyper-chaotic optical wireless encryption system

提出了一种将Chebyshev混沌序列和RSA算法结合的加密算法。优化了超混沌加密数字信号,在电域对信号进行了非规则LDPC编码、RSA工钥算法和Chebyshev映射,成功加密了数字信号流。采用非规则长LDPC纠错编码降低了光纤链路中的色散效应,利用Chebyshev序列对初始条件的敏感性将其作为密钥。仿真结果表明,该算法具有较高的安全性。

The paper proposes a method of encryption to combine Chebyshev chaotic sequence with RSA al- gorithm. The method optimizes the hyper-chaotic encryption of digital signal, through using irregular LDPC code, RSA algorithm and Chebyshev mapping in the electrical domain, the paper successful encrypts digital signal flow. The long irregular LDPC code is used to reduce the dispersion effect in the optical fiber link, the Chebyshev sequence is adopted for the secure key which is sensitive to the initial condition. The simulation results show that the algorithm has high security.