Facing these safe demand, this paper is applied on active label, safety isolation and unequal access control technology based on trusted computing technology, begin from the hardware first floor, build the trust relation among user, platform and network.

Introducing the reputation grade, classifications and access control grade, a new information flow model on P2P based on trust and security grade was described, with the security classification achieved by access control grade, and with the information flow role described by access control grade of two objects.

The article emphasizes on discussing the two measures to protect the datum in the network:accessing control measure and information encryption measure.

The paper introduces the three kinds of threatens to campus network s safety and resolving methods, especially showing how to use the method of accessing control to safeguard the campus network

In order to take effective precautions against illegal operation of routers and strengthen the security of computer network, this paper briefly introduces some kinds of the configuration methods of access control ASN routers.

Application of extended role-based access control under the struts framework;

A lattice-based access control model;

This paper discusses the interview control model based on roles firstly,and then brings forward a model of purview assignment based on role and interview control,finally it was realized in police technological investigation managerial system.