摘要
针对在语音保密通信中提高保密性能和降低同步要求的矛盾,提出了在无需帧同步的语■置乱体制中实现密码滚动的方案。密码滚动大大提高了该体制抗密码分析,■是抗植入明文攻击的能力,为该体制的付诸实用提供了保证。
A practical cipher rolling method used in the speech scrambling system needing no frame synchronization is investigated in this paper. Accor-ding to this method, it is possible that the cipher is rolled frequcntly with-out frame synchronization. This feacure increases greatly the ability of the cryptoanalysis-proof of the system, espcially the ability of preventing plan-ted plaintext attack. As a result, the contradiction between high secure per-formance and low synchronous requirement is handled perfectly. The availa-bility of the system is guaranteed.
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
1991年第5期1-8,共8页
Journal of Southeast University：Natural Science Edition
关键词
保密通信
语音处理
密码滚动
frame alignment
secret communications
speech processing / A-D-A
speech scramble
cipher rolling
