An Optimization Safety Solution for Sip Call Base on ESP.

With the development of the network and the popularization of informatization, traditional circuit domain telephones are far from people's needs. Therefore, the development of sip phones is particularly rapid. Unlike traditional circuit domain telephones, sip phones can be completely established in IP networks. However, IP networks have unpredictable vulnerabilities, so for sip phones, the implementation of a secure sip phone is naturally very important. Most of today's sip phones are protected against security by using "Internet protocol security" (IPSec), but it has the problem of key exposure. As long as the hacker controls the client, the key will be very simple to get, so that the IP packet can be copied and the client's SIP phone can be completely controlled. This paper proposes an ESP-based sip telephony optimization solution that can effectively prevent hackers from gaining full control of the client's sip calls after they get the keys.