关键词: 虚拟专用网, 移动代理, 防火墙, 加密, 签名

Abstract: Aimed at the security problem in network information exchange,combining Virtual Private Network(VPN) and mobile Agent technologies,a new VPN security architecture named VPNAgent System was presented which works at a virtual private network.The system has a mobile Agent named VPNClientAgent which is an analogy to the cumtoms Agent in real life.It works at the client,inspects the packets, signs the legal ones and guards them to the firewall.There is a static Agent named StaticAgent.The StaticAgent inspects the signature of the packets and the packets with valid signature can go through the firewall without decryption to improve the security of the packets.

Key words: VPN(Virtual Private Network), mobile Agent, firewall, encryption, signature