A Survey on Attack Detection Techniques in Delay Tolerant Network
DTN is a network in which there is no end to end connectivity between source and destination. DTN is characterized by long propagation delay and intermittent connectivity. Due to the limited connectivity, DTN is vulnerable to various attacks, including blackhole and greyhole attacks. Malicious nodes drops all or a part of the received messages, even if they have enough buffer storage. This dropping behavior is known as blackhole and greyhole attacks respectively. This paper provides different types of scheme and their comparison with different parameters. Existing research scheme can detect individual attackers well but they cannot handle the case where attackers cooperate to avoid the detection. The limitation of previous work is that they cannot defend against collusion attacks. Therefore there is a need to develop new attack detection scheme that detects collusion attacks effectively.