混沌在语音保密中的应用

Application of chaotic signal in phonetic secrecy

为了加强语音传输的安全性,利用混沌的特性,把混沌作为加密钥加入到语音信号中形成密文,并从此密文中剔除混沌信号将语音信号还原,从而实现了对实时语音的加密解密处理。通过计算机仿真,实现了语音信号的加密工作,对密文用两种解密钥进行解密。分析所得的结果表明,把混沌加入语音信号中形成的密文保密特性较好,不易被破解,混沌是一种有效的保障信息安全的工具。

For improving security of voice in its transportation, chaotic signal is taken as a key and added in the phonetic signal to form a cryptogram. Eliminating the chaotic signal from the cryptogram, the original phonetic signal is obtained, thus the real - time encryption and decryption of phonetic signal are realized. The phonetic signal encryption is implemented through the computer simulation, and two kinds of keys are used for decryption of the cryptogram. Analysis showed that the cryptogram formed by adding chaotic signal has good security; chaotic signal is an efficient tool for ensuring information safety.