Date Added: Dec 2011
Mobile Ad hoc Networks are the new paradigm of wireless networks that are capable of operating without the support of any fixed infrastructure. The most indispensable service of wireless network is security. The various security goals should be achieved such as confidentiality, integrity, authentication, availability, non repudiation etc for the secure routing in MANETS. In this paper, the authors have attempted to present an overview of various security attacks and their counter measures in MANET. They had given an overview of the various attacks at different layers followed by the measures taken to counter these attacks.