【摘要】 指出了在遥测系统中应用信息保密技术的必要性。结合遥测数据加密的基本要求,提出对遥测PCM数据进行混沌加密的方法,着重分析了遥测PCM系统的信息加密方案和密钥同步实现措施。该措施有助于遥测信号中断后的密钥重新准确同步,另外还对收发两端密钥同步的可靠性进行了理论计算,同时分析讨论了该遥测PCM混沌加密系统的安全性能。仿真结果表明,该方法没有引起收端的误码扩散,而且能够确保遥测PCM系统的加密强度要求。更多还原

【Abstract】 This paper pointed out the indispensability of the encryption technique in the telemetry system.A new method based on the chaotic encryption is put forward,and the key synchronization implementation is analyzed,which helps to the key re-synchronization after signal interruption.In addition,the reliability of key synchronization of Tx/Rx end is theoretically calculated.The security of the telemetry PCM encryption system is discussed.The simulation results show that not only the error-diffusion in the receiver is not introduced,but also the encryption intensity of telemetry PCM system is assured.更多还原