An Analysis on Cooperative Attacks in Manets

Abstract

ABTRACT This paper presents a review on a major category of organized attacks i.e. cooperative blackhole / grayhole attack that are a serious threat to adhoc 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 have been proposed in the literature for diction of such attacks is presented.