VPN Architecture Enabling Users to be Associated with Multple VPNs

Recent development of network technologies enables network communications in various social organizations and enables various social organizations to be virtualized in networks. We named the mass of virtual organizations ”cyber-society”. A ”person” in cyber-society needs to establish communication association s with multiple virtual organizations with adequate security. Therefore, we beli eve that VPN service is applicable to realize cyber-society because of its security. In this paper, we propose VPN architecture where a single user’s host can b e simultaneously associated with multiple VPNs corresponding to virtual organiza tions. Because our architecture enables VPN service to be utilized per customer’ s host basis, it is more flexible than PPVPN (Provider Provisioned VPN) architec ture, which is designed per customer’s site basis. Additionally, our architectur e is superior to an extranet architecture in terms of forwarding performance, be cause it enables users to directly and simultaneously access to destination VPNs.