Mobile ad hoc network comes with lots of advantages in terms of flexibility, mobile nodes, infrastructureless environment etc. But in cost of these advantages it brings security and uncertainty because of dynamic topology and lack of any fix infrastructure. So this work aims to detect such uncertainties in MANET. Also hacker nodes in the network challenge to the security of MANET by their non co-operation with selfish nature. These types of nodes are responsible for the uncertainty of network. In this work we can detect network�s uncertainty and also try to increase its certainty by using belief, disbelief, friendship degrees which will help to guide the nodes to identify trusty neighbours. Work has been implementated by using NS2 simulator, with varying number of nodes, speed, time with intentionally adding hacker nodes.
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