Attacker and different security scheme in Delay Tolerant Wireless Ad hoc Network

Mobile Ad hoc Networks (MANETs) are attractive and more popular these days. The bundle of messages or data sent in dynamic network is called Delay Tolerant Network (DTN). The reason of popularity of this kind of network is its easy establishment at any place. The mobile nodes independently work as intermediate node as well as sender and receiver. The connection establishment and data sending is possible through routing protocols of MANET. The routing protocols of DTN are not same as traditional wireless routing protocols. One major issue on this network is security. Its extensive use necessitates for making the networks safe, efficient as well as impressive. Much effort are required to improve the various demands of network security inconsistency with the demands on mobile networks and the nature of the mobile devices like low processing and communication in open environment. The perception and structure of Wireless Ad hoc DTN creates them flat to be easily attacked using numerous techniques often used alongside wired networks as well as new methods particularly to DTN. Security issues begins in many different fields counting with physical security, key management, routing and Intrusion Detection and Prevention, many of which are vital to a functional dynamic network. This article is mainly focused on the security issues related to DTN routing protocols. The routing in DTN remains a key issue because without accurately functioning of routing protocols, the network will not work efficiently, it's intended to. Regrettably, routing is also most difficult to protect against attacks of malicious activities due to absence of centralized authority in DTN. Main protection menace involved in routing with dynamic network as well as the recent solutions against different attacks proposed by various researchers in Wireless Ad hoc DTN is presented here..