Abstract
DTNs are designed to work in post disaster scenario where partitions between nodes are large. To transfer messages in this situation DTN uses intermediate nodes to forward messages. The mechanism used here is store, carry and forward. But here, securely transferring messages from one node to other node is quite challenging task because an intermediate node may behaves maliciously. A malicious node may be a black hole, selfish node or sinkhole. This paper focuses on black hole attack. In this paper a cooperative mechanism is described in literature [6] that helps in prevention of network from black hole attack. A review of this proposition has led to an identification of modifications that can be incorporate to yield better results. These modifications are enlisted in the paper.
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