Aimed at the weakness both in security and efficiency of one-hop one-way authentication SA(security association) mechanism employed by Mesh network,an multi-hops mutual authentication SA mechanism associated with hypo-optimal self-modified routing is proposed.

ECC-based key agreement and mutual authentication scheme;

An efficient mutual authentication and key agreement protocol for mobile communication system;

A Mutual Authentication Protocol of Encrypted WAP;

This scheme not only provided the function of bidirectional authentication and key agreement between users,but also suited the computational requirement of mobile terminals and reduced the complexity of security system.

Base on this,it raises the two-way authentication mechanism,and introduces the basic theory of two-way authentication and its main algorithm.

Then, based on the characteristics of phishing, the paper proposes a kind of authentication model with both two-factor authentication advantages and two-way authentication advantages to defend against phishing.

This paper analyses the process of pre-shared key authentication, discusses its security issues, and presents an improved pre-shared key mechanism for two-way authentication to authenticate the remote users in IKE.

1x access control protocol and the firewall packet filtering strategy,as well as elaborated how to design the security access control system of the adaptive wireless gateway in the aspect of the port control, bi-directional user certificate authentication and packet filtering.