无线VoIP系统语音加密算法的研究

随着无线网络的飞速发展和VoIP技术的日渐成熟,无线VoIP技术应运而生。由于无线网络安全的脆弱性和VoIP系统本身的安全问题使得无线VoIP系统在安全方面存在着各种隐患。为提高无线VoIP的安全性,采用高压缩率的语音编解码技术G.729提高无线VoIP的通话质量;采用高级加密标准(AES算法)加解密采用G.729压缩过的语音信息;选用椭圆曲线密码(ECC算法)传输AES算法中用到的会话密钥;利用混沌系统可以提供可重复的随机数序列且其序列仅与系统参数和初值有关的性质确保了会话密钥的保密性。

Research of Speech Encryption Algorithm for Wireless VoIP System

With the rapid development of wireless networks and the gradual maturation of VoIP technology,wireless VoIP technology comes into being.Because the security of wireless networks is frangible and VoIP system itself is not safety,there are many kinds of hidden dangers in the area of security for wireless VoIP system.In order to enhance the security of wireless VoIP,high-rate voice compression codec G.729 technology is used to improve the quality of wireless VoIP calls;the Advanced Encryption Standard(AES algorithm) is used to encryption and decryption the voice message which is compressed by G.729;elliptic curve cryptography(ECC algorithm) is selected to transmit the session key which is used by AES algorithm;the confidentiality of the session key is ensured by the characters of the chaotic system that the chaotic system can provide repeatable random number sequence and the sequence is only determined by system parameters and initial value.