In this work,we propose a two-stage authentication approach that allows a mobile device to perform authentication through fast handover protocol and obtain a temporary certificate from the targeted access point before roaming to the new domain,so that it can resume the authorized access quickly by using the temporary certificate.

This article proposed the architecture of body sensor network.

The article introduce the condition about trustworthy network research at present,and the condition of cam- pus network security in our country,analyse the key problem of structuring trustworthy network¨Dnetwork ID,put for- ward our solution¨Dnetwork ID system,and then put forward a trustworthy campus network model on the basis.