Research And Implement On The Asymmetric Authentication Scheme Of WLAN

Wireless Local Area Network means computer local area network using wireless transmission media. For the flexible installation and convenient use, it's widely used in enterprise, office, home, airport, hospital, emergency service, disaster relief, etc. But meanwhile, it's openning transmission media brings many security problems, for example, the data is easily be sniffed, intercepted or tampered, the wireless equipment is easily meet with denial of service, counterfeit and such attacks. These security problems seriously restrain the high-speed and healthy development of wireless local area network, which become research hot spot in the field of WLAN.This dissertation analyzes the existing security mechanism of wireless local area network, carries three important parts of wireless local area network(wireless interception, identity counterfeit and data tamper),gives a asymmetric mutual authentication scheme for WLAN which based on 802.1X authentication infrastructure, then analyses the security and gives the BAN-like logic formal proof. The scheme can complete the mutual authentication between STA and AS well,using the improved E1Gamal digital signature scheme in STA,which the signature generates is simple and PRab-R digital signature scheme with message recovery function in AS,which can save valuable bandwidth in communication effectively.Gives the simulation experiment of the scheme on windows platform,the result of the experiment can prove that the scheme is feasible.