VoIP的语音动态加密方法研究

针对目前VoIP语音加密的不足，使用一种对语音进行分组加密的动态加密方法，通过对加密算法的动态选择，以及密钥的动态分配来增加加密的复杂度，利用数字信封技术来保证密钥的安全传输，提高通话安全。文中最后选择软件SJphone作为模拟的平台，并通过搭建实验环境对语音加密模块进行多次模拟，同时使用延时测试软件对加密造成的延时进行评估测量，并调节分组大小减少延时，提高通话质量。

Research of Dynamic Encryption Methods on VoIP

According to the current deficiency in encryption on VoIP, this paper describes a dynamic encryption method based on the voice packet, thus to increase the complexity of encryption and the security of communication by dynamically choosing the encryption algorithms and allocating the keys. And the digital envelope is also used to ensure the secure transmission of the keys. Finally the SJ phone software is chosen as the simulation platform, and an experimental environment constructed, the voice encryption module is thus repeatedly simulated. And a delay-test software is also used to measure and evaluate the delay caused by the encryption, thus trying to adjust the size of voice packet, shorten the.delay and raise the quality of voice communication.