Secure transmission of packets using D-S theory for preventing MANET by attacks

Security is the main issue of the mobile ad-hoc network, because of mobile nodes behavior. The topology of MANET changes frequently due to nodes mobility, by this property newly node easily enters or exit from a particular area. In this paper, we go through the study about mobile ad-hoc network and role of soft computing in this network. In our proposed work we apply Dempster Shafer theory for calculating the trust of nodes. this trust value works as a public key of the nodes so that whenever one node transmits the packet to another node it decrypt the packet using its public key this technique secure our transmission over the network by using this crypto approach we prevent our network by passive attacks or by using trust value we find out malicious behavior of nodes. Implementation of our work done on the ns-2.35 novelty of our work proof by our outcomes.