Abstract:

In order to solve several problems of typical VPN(Virtual Private Network) network, including the deficiency of extension mechanism, deficiency of management, singleness of access terminal and access methods, a new network building mode called P2P（Peer-to-Peer）-VPN is discussed .The advanced search mechanism of P2P technology will be adopted to VPN network to improve the flexibility, expandability, access terminal and access method diversity of traditional VPN network. Meanwhile, the weak security of the network caused by P2P technology can be avoided by the effectiveness verification from the thirdparty certification and identity authentication.

Key words: virtual private network, search mechanism, identity authentication