摘要
针对通话在电话网被窃听的问题,设计了一种具高安全性的话音保密系统.该系 统采用一种新的256比特分组密码算法———Must2和伪随机数产生器算法———Must Rnd,并采用高安全性的会话密钥传送方法,把由Must Rnd产生的会话密钥传送到被叫 的电话终端,供Must2在通话时作实时加密及解密之用.将该系统在TMS320VC5402数字 信号处理器(DSP)上予以实现,通话质量良好.
A speech communication system with high security was designed to overcome the trouble of eavesdropping. In this system, a new 256-bit block cipher—Must2 and a pseudorandom number generator—Must-Rnd as well as a high-security public key cryptosystem for a session key are employed. Thus, the session key caused by Must-Rnd is transmitted to the far end of the telephone for the real-time speech encryption and decryption by Must2. The proposed system is finally implemented on the TMS320VC5402 Digital Signal Processor (DSP) with good audio quality.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2005年第2期60-64,共5页
Journal of South China University of Technology(Natural Science Edition)
关键词
语音保密系统
算法
分组密码
公钥密码
会话密钥
伪随机数产生器
数字密码器
secure speech communication system
algorithm
block cipher
public key cipher
session key
pseudorandom number generator
digital scrambler
