Secure intrusion detection system for mobile adhoc networks

These are the networks which are formed by Mobile hand held devices like cell phones, laptops etc. Nodes in these networks are mobile in nature. Mobile adhoc networks are very useful in the situations such as military operations, disaster management etc. These networks do not require special additional fixed infrastructure but with the existing infrastructure all mobile nodes can cooperate and reach on some consensus about the intrusion into the systems. Since data moves in open wireless environment, nodes are frequently joining and going away and they are used in very crucial situations, so there security is of major concerns.