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Mobile Adhoc NETworks (MANETs) is a highly challenged network environment due to its special characteristics such as decentralization, dynamic topology and neighbor based routing. Most important application for ad-hoc networks is group oriented in nature and can therefore benefit from a multicast communication services. Most of the multicast routing protocols assume trusted, non-adversarial environment and do not take security issues into the account. The security issue of MANETs in group communication is more challenging because of multiple senders and multiple receivers. MANET is vulnerable to several types of security attack and the focus of earlier research is only on unicast applications.
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