Abstract:
For the GSM security mechanisms can not achieve end-to-end secure communications, this paper presents a novel voice encryption algorithm, which can penetrate RPE-LTP coding Vocoder. The encryption algorithm does not destroy voice features, has anti-RPE-LTP coding features, and can realize the end-to-end secure communications in the GSM voice channel. It can receive good encryption effects when the algorithm parameter is among 20 and 25, and it can get good distortion on time domain and frequency domain when the parameter is 20.
Key words:
voice encryption,
GSM system,
RPE-LTP compress coding,
end-to-end secure communications
摘要： 针对GSM系统的安全机制不能实现端到端安全通信，提出一种能够穿透RPE-LTP压缩编码声码器的新型语音加密算法。该算法不会破坏语音特征，可以抗RPE-LTP压缩编码，实现在GSM语音通道中的端到端安全通信。选择算法参数的值取20~25时可以获得良好的加解密效果，取20时可以获得良好的时、频域失真度。
关键词:
语音加密,
GSM系统,
规则脉冲激励-长期预测压缩编码,
端到端安全通信
CLC Number:
ZHOU Shi-jian; QI Hong-fei; JIANG Rui; YANG Xiao-hui. Voice Encryption Algorithm of Anti-RPE-LTP Compress Coding[J]. Computer Engineering, 2008, 34(13): 163-165.
周世健;齐宏飞;蒋 睿;杨晓辉. 抗RPE-LTP压缩编码的语音加密算法[J]. 计算机工程, 2008, 34(13): 163-165.