Ad-hoc networks refer to temporary networks which form for special purposes. Mobile ad-hoc networks

(MANETs) are networks which use no network assisting element for routing, but every node has the role of

router and actively participates in data forwarding. Security problems in MANETs are specified and

investigated separately, because in these infrastructureless networks, in addition to all available problems in a

wired or wireless network, there are some more problems. Since all connections are available in wireless

form and they are audible, so they can be changeable. Also nodes themselves are involved in routing, so

existence of a malicious node can lead to the destruction of the network and one of the most important

challenges in these networks