A Review Paper on Cooperative Blackhole and Grayhole Attacks in Mobile Ad Hoc Networks
This paper presents a review on a major category of coordinated attacks i.e. cooperative blackhole / grayhole attack which are a serious threat to ad hoc network security. In cooperative blackhole attack multiple nodes collude to hide the malicious activity of other nodes; hence such attacks are more difficult to detect. In this paper a survey of various security mechanisms that have been proposed in the literature for diction of such attacks is presented.