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针对混沌同步保密通信中由于同步实现导致参数敏感性下降,无法保证安全性的普遍问题,提出一类新的具有时变参数的混沌同步保密通信的理论方法,并证明了其同步稳定性.时变参数使混沌系统运动轨迹总体服从奇异吸引子,局部小范围作随机波动,混沌运动的复杂性显著提高,难以用参数估计方法破译.参数敏感度级数从1级提高到10级,使之有效抵御穷举法、基于相空间重构等方法的攻击.若采用主动-被动同步方式,同步误差为零.本方法适用于一类连续混沌系统.
Aiming at the general problem of chaos synchronization secure communication that the parameter sensitivity decreases and the security can not be guaranteed, a new class of chaos synchronization secure communication with time-varying parameters is proposed and the synchronization stability is proved. The variable parameters make the chaotic system’s trajectory follow the singular attractor, and the local small range makes random fluctuation. The complexity of chaotic motion is significantly increased and it is difficult to decipher the parameters by the parameter estimation method. The sensitivity level of the parameter is increased from 1 level to 10 level, Effectively resist the exhaustive method, based on phase space reconstruction and other methods of attack.If the active-passive synchronization method, the synchronization error is zero.This method is suitable for a class of continuous chaotic system.