Date Added: Jan 2013
Mobile Ad-hoc NETworks (MANETs) are self organizing devices with no infrastructure control. Concept of security is major concern because of changing topology and no centralized control. Since MANET's are prone to many kind of vulnerabilities it is not necessary that any one kind of attack may be active at a moment hence there is a need to have a security system which could take into consideration many possibilities at the same time. The problem of intrusion detection and denial of service attack have been discussed in this paper.