【摘要】 针对目前的再入遥测PCM数据在开放空间中传播时存在安全隐患的问题。提出了对其进行混沌加密后再传送给接收方的方案,首先利用混沌非线性系统的优异特性,建立了对再入遥测PCM数据进行"一次一密‘的混沌流加密方案模型,并详细设计了加、解密系统及收发两端密钥同步的实现措施。实验结果表明所产生的混沌二进制密钥序列既能通过密码学检验,而且又能在保证系统足够的加密强度前提下,收端不会出现误码扩散,同时收端解密密钥的同步成功率也能得到极大提高,成功地解决了收端解密密钥的可靠性和鲁棒性问题。该方案为再入遥测保密系统的工程实施做了有益的探索。更多还原

【Abstract】 In view of the security problem of the reentry-telemetry PCM system during the transmission of PCM data in the open space,a data encryption scheme based on the chaotic theory is proposed.Firstly,by using the excellent characteristic of chaotic non-linear system,a model of chaotic encryption is built,in which the PCM data are encrypted by the technique of the one-time pad,and the method of the encryption and decryption is discussed in detail,including the synchronous measure of working key in both transmitter and receiver sides.The results show that the chaotic key stream can pass the test of the cryptography,and on the one side,the encryption intensity of the reentry-telemetry PCM secret system is assured,on the other side,the diffusion of error bit won’t arise.Of course,the synchro-success rate of working key is improved greatly.In a word,the reliability and the robustness of the working key in receiver can also be realized successfully in this scheme.So some helpful references can be provided for the realization of the reentry-telemetry PCM secret system.更多还原