Comparative Analysis of Various Techniques used for Selfish Node Detection in DTN

Delay Tolerant Network is a network which is wireless and which has no infrastructure. It is designed in a way that it can operate effectively even in extreme diverse conditions and can cover large distances, as in the case of space communications when there is not a single direct pathway between source and destination. Messages are delivered based on store, carry and forward Policy. Data is transmitted in DTN through the number of intermediate nodes but some of them are malicious that are called selfish nodes. A selfish node can be described as a node which do not responds to any of the received messages in order to save its energy. There are many terms coined for this such as selfish node attack, byzantine attack, black hole attack and denial of service attack. An analysis of the techniques proposed to detect selfish behavior in DTN in the perspective of simulation tools used has been presented in this paper.