Study Of Wireless Lan Security

With the rapid development of WLAN, the application of WLAN is more and more extensive. The WLAN technology has been introduced in various areas. While the rapid development of WLAN, the higher requirements have been put forward for the network security.In the absence of adequate attention to usability issues in 802.11i, so there are a lot of DOS defects. In this paper, on the basis of the recalling DOS defects, analysis a method of DOS defects from 802.11i, that is DOS defects against to RSN IE. In this paper, the recovery strategies when the protocol is failure are discussed, and the programs of solving these defects are introduced.In this paper, the 802.11i security standard which is established by IEEE is primary research content, especially four-way handshake protocol which is generated by key management and provisional encryption keys is detailed verification, so the attack of rejecting services which the protocol faces is discovered. The new improvement method based on digital envelope technology has been proposed. At the same time by using the parameters of the main key consultations and the public-key encryption,the key which is used digital communication can be accessed true .This method prevents the attack of rejecting services, and makes the program of handshake simpler, and decreases the cost of network transmission...