MANET is multi-hop network in which collection of mobile nodes is self configurable and co-operates together for communicating data without the need of any centralized component for management. Due to this dynamic nature of topology and infrastructure less frame in MANET, these nodes have to rely on each other for data transmission in multi-hop fashion and thus are prone to packet drop attacks like Blackhole attack, CoOperative Blackhole attack, etc and various types of data security attacks. In this paper, Solutions are proposed to detect Collaborative co-operative Blackhole attack in MANET. We introduced the mechanism of TRACEROUTE that helps in detecting the source of collaborative Blackhole attack and thus break the collaboration by eliminating and marking source of Collaboration between those malicious nodes. AODV routing protocol is enhanced by introducing new field that helps in finding the optimal, secure and reliable routes. These Solutions are compared with W-AODV for Packet Delivery Ratio, Control load, accuracy in Blackhole detection and accuracy in Blackhole detection.
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