A chaotic synchronized secure communication scheme based on the active - passive pattern , with time - varying behavior via a parameter perturbation technique is proposed in the end of this thesis . the computer simulation and performance analysis results show that the compensation is well done to solve the conflict between the synchronized error and the parameter sensitivity . its capacity against attacks is also discussed 最后以主動(dòng)?被動(dòng)同步方法為基礎(chǔ),提出了一種變參數(shù)混沌同步保密通信方案,對(duì)該方案的抗攻擊性、同步特性等各方面特性作了詳細(xì)的分析,分析結(jié)果表明該方案具有一定的抗攻擊性與實(shí)用性。