基于混沌序列的遥测PCM数据加密算法

Data Encryption Algorithm of Telemetry PCM System Based on Chaotic Sequence

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。

This paper pointed out the indispensability of the eneryption 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.