high-eficiency

WIMAX is a Low-cost,high-eficiency,large-scale broadband wireless access technology. As a rising technology,it attracts IT companies all over the world.Although it grows up rapidly, many specialists and analysts point out that security problem will limit its development before it is used on a large scale.WiMAX security criterion based on the Security Sublayer of MAC layer defined in IEEE 802.16d and in IEEE 802.16e. This Security Sublayer includes two component protocols, an encapsulation protocol and a key management protocol (PKM), providing secure services such as authentication, authorization and encryption. IEEE802.16e makes improvements to the Security Sublayer defined in IEEE 802.16d, but there are still some security problems need to be resolved.This article detailedly analyzes the encapsulation protocol and Privacy Key Management Protocol,points out some security leak of this protocol, and provides some solutions to improve the security of protocol.First of all,According to security sublayer in IEEE802.16 standard,the security mechanism of IEEE802.16-2004 and IEEE802.16-2005 is discussed first,the process in authentication mechanisms, key distribution, data encryption and establish between base station and mobile station is established. The mechanism's response against the classic atacks is analyzed. Then, we found that lack of definition on some security problems, the vulnerability of authorization mechanism and the weak ability of the mobie terminal would bring some security problems.Secondly ,on this basis,The weil Pairing based Elliptic Curve and Cryptography-based identity is introduced into WiMAX,and adjustments and improvements are proposed according to WiMAX's features. We propose IBE technology for the authentication mechanism and security mechanism, Improved WiMAX improved system security system.At last,the summary of the paper is proposed,and the future work is advised.
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