集群通信系统语音加密的研究

集群通信系统要传输大量机密信息,对通信保密性要求很高。文章重点介绍数字语音信号作为明文送入加密器里,和以IDEA加密算法为基础设计的密码流发生器(KSG)产生的密码序列进行加密运算,得到密文信号,解密过程与加密相似,并研究了此保密过程的密码同步问题,为语音加密技术应用到实际系统中做出了探索。

Research on Voice Encryption of Trunking Communication System

The trunking communication system needs to transmit large amount of secret information, and have high security demand. The main research part of this thesis is as following: first, input the digital signal to the encryption device, and then proceed the encryption algorithm with the keying sequence generated by key stream generator (KSG) which is based on the IDEA encrypt algorithm. And finally we get ciphertext. The deciphering process is similar to the encryption process. The secret key synchronization is also studied. The contents studied in this thesis can be seen as an explore to the implementation of voice encryption to the practical system.