中文摘要：

针对参数未知的Lorenz混沌系统，根据Lyapunov稳定性原理，给出了自适应同步控制器和参数自适应率，实现了系统的反同步与参数估计。将该同步方案应用于保密通信，设计了混沌掩盖保密通信方案。基于Matlab的数值仿真结果证明了自适应反同步控制方法和保密通信方案的有效性。

英文摘要：

Aiming at the Lorenz chaotic system with unknown parameters, presents the adaptive anti-synchronization controller and the parameters of adaptive rate based on Lyapunov stability theory. It realizes system anti-synchronization and parameter estimation effectively. Applies this synchronization to security communications and designs secure communication scheme with chaotic masking. Simulation results on Matlab confirm that both the adaptive anti-synchronization approach and the secure communication scheme are effective.