GTP Security in 3G Core Network

Nowadays, 3G netowrk plays a very important role in mobile communication system. But the security concern of such network, especially the core network, is far from being satisfied. GPRS Tunnel Protocol(GTP), which is one of the key protocols in the core network, is quite vulnerable to attacks in the flat, full IP environment. Therefore solving such problem properly is very urgent and important for the operation of 3G network. In this paper, a security analysis of GTP is presented, a defense solution for these security threats and an event-based description language are also proposed. The experiment result shows the potential of our solution.