由于异步模数模语音加密技术不需要帧同步,所以它具有信道适应性好而受到重视。但其安全性不够理想。本文首先简述该体制保密度低的主要原因,并指出提高其保密度的有效途径,最后在文献[11]的基础上提出了一种新的伪谱插入技术和纠错编码相结合的密钥滚动方案。 As asynchronous analog-digital voice encryption technology does not require frame synchronization, so it has a good channel adaptability and attention. However, its safety is not ideal. This paper first briefly describes the main reasons for the low degree of system security and points out the effective way to improve its security. Finally, based on the literature [11], a new pseudospectral insertion technique and error correction coding are combined Key rolling scheme.