摘要
为进行合法监听并获取通话双方的密钥,对Diffie-Hellman算法进行了改进,提出两阶段式的密钥交换机制,并修改SIP协议的相关信息,将SRTP的功能集成在SIP用户代理程序上.使用该方法对安全VoIP进行监听的实验发现,SRTP对传送端和接收端的性能影响都相当微小,结果表明该方法是可行的和有效的.
In order to intercept lawfully over secure VoIP,this article improves the Diffie-Hellman algorithm to make the third part get the session key of two users,and puts forward two steps key exchange,at the same time updates the SIP protocol,integrates SRTP in SIP user agent.Experiment shows this implementation of lawful interception is feasible and safe.
出处
《西南师范大学学报(自然科学版)》
CAS
CSCD
北大核心
2011年第2期99-103,共5页
Journal of Southwest China Normal University(Natural Science Edition)
关键词
网络语音技术
SIP协议
SRTP协议
密钥交换
合法监听
VoIP
Session Initiation Protocol
Secure Real-Time Transmission Protocol
key exchange
lawful interception