Date Added: Jul 2012
Wireless networks are envisioned to consist of large number of inexpensive and small nodes with sensing, data processing, and communication capabilities which are densely deployed in a region of interest and collaborate to accomplish a common task. One main challenge in design of these networks is their vulnerability to security attacks. However, there are various techniques exists in the literature like cryptography, stenography which are basically used to detect, and to protect the information from being detected by an attacker. But the experience shows, there are various overheads involved in their implementation like exchange of secret keys etc.