基于混沌序列的无人机测控信息加密方法研究

Research on encryption technology of UAV measure and control information based on chaotic sequence

为提高无人机测控信息传输的安全可靠性,提出了一种新的二维混沌无人机通信加密方法.结合Sine混沌映射和Henon混沌映射进行混沌系统改进,利用改进的混沌系统生成的随机性强的一维输出序列对标准Zigzag变换进行优化;同时利用另外一维混沌输出序列作为无人机扩频通信系统中的伪随机序列(PN码)对信息进行扩频,从而增强传输信息的隐秘性.分析结果表明,改进后的加密系统密钥空间得到显著扩大,增加了攻击者破译信息的难度,可提升无人机信息传输安全性能.

In order to improve the security and reliability of UAV measure and control information transmis-sion,a new two-dimensional chaotic communication encryption method for UAV is proposed.The chaotic system is improved by combining Sine chaotic mapping and Henon chaotic mapping,and the standard Zigzag transform is optimized by using the one-dimensional output sequence with strong randomness generated by the improved chaotic system.At the same time,another one-dimensional chaotic output sequence is used as the pseudo-random sequence(PN code)in the UAV spread spectrum communication system to spread spectrum of the information,so as to enhance the secrecy of the transmitted information.The analysis results show that the key space of the im-proved encryption system is significantly expanded,which increases the difficulty of the attacker to decipher the information,and can improve the security performance of the UAV information transmission.