1. WHAT IS AD HOC NETWORK? Security within Ad hoc Networks

With the advancement in radio technologies like Bluetooth, IEEE 802.11 or Hiperlan, a new concept of networking has emerged. This is known as ad hoc networking where potential mobile users arrive within the common perimeter of radio link and participate in setting up the network topology for communication. Nodes within ad hoc are mobile and they communicate with each other within radio range through direct wireless links or multihop routing. 2. LACK OF SECURITY WITHIN AD HOC NETWORK The build up of ad hoc network can be envisaged where support of wireless access or wired backbone is not feasible. Ad hoc wireless network does not have any predefined infrastructure and all network services are configured and created on the fly. Thus it is obvious that with lack of infrastructural support and susceptible wireless link attacks, security in ad hoc network becomes inherent weakness. Achieving security within ad hoc networking is challenging due to following reasons [2]