Preventing ARP spoofing in WLAN using SHA-512

In most of the organizations, the use of Wireless Local Area Network (WLAN) is increasing promisingly. WLAN security is mainly affected by two internal attacks: Rogue Access Point (RAP) and Rogue Dynamic Host Configuration Protocol (DHCP) Server. Rogue Access Point is installed either by employees or by hackers. Employees install rogue access point for flexibility and scalability. Hackers install rogue access point to breach the security either internally or externally. DHCP server normally does not use authentication when servicing clients that needs dynamic IP address. To secure the organizations from network attacks it is necessary to detect the installation of rogue access point and rogue DHCP server. There are several methods to detect these attacks but still need arise for suggesting a method that provides solution for Address Resolution Protocol (ARP) spoofing. Since spoofing can easily be performed so it will be a major threat in wireless security. This paper presents a method to prevent this attack. The proposed approach uses hash algorithm to assure authenticity and integrity. The proposed solution is feasible and easy to implement.