2IYU-T Recommendation X.509.Information Technology- Open Systems Interconnection - The Directory: Authentication Framework (Equivalent toIOS/IEC 9594-8,1997),1997-07
3http://www.olm.com.cn/product/cp_rzwg.htm
4http://www.wiseguard.com.cn/
5Beck R.Dealing with Public Ethernet Jacks Switches, Gateways, and Authentication. Washington,USA:Proceedings of LISA ′99:13th Systems Administration Conference, Seattle, 1999
