International Journal of Advanced Research in Computer Science and Software Engineering (IJARCSSE)
IEEE standard 802.11i is the latest standard for security in Wireless LAN (WLAN). This standard provides data confidentiality as well as integrity. The 802.11i 4-way handshake and key management stays secure against any attack the key used for this purpose is secure. But, availability is main issue because 802.11i is subjected to Denial of Service (DoS) attacks. Since first message in the 4-way handshake is not encrypted and protected by any method so counterfeiting these messages is possible. This paper presents a simple proposal to prevent DoS attacks against the 4-way handshake protocol.