Recent growth and popularity of MANETs and their use in various settings has prompted new scenarios where secure and privacy-preserving networking operation is highly most important. Location information has recently become increasingly available through small and in expensive global positioning system (GPS) receivers, partially prompted by the emerging trend to incorporate location-sensing into personal hand-held and other wireless devices. Some loopholes of Anonymous Location-Aided Routing in MANETS (ALARM) protocol come in focus. ALARM protocol does not the issues like adversaries that mount Denial-of-Service (DoS) attack by creating wormholes and other topological abnormalities. To compare the vulnerability effects of wormhole attack on the ALARM protocols against the attack, there is a need to address the location based protocols as well as the impacts of the attacks on the MANETs. In this paper we proposed to enhance security in ALARM protocol by Addressing Wormhole Attack along with analyzing the effects of Wormhole attack on basis of, Network load, throughput and Packet delivery Ratio in ALARM. We have simulated the Wormhole attack using Proactive routing protocols.
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