Date Added: Jan 2011
Security is typically an important issue in wireless ad-hoc networks, including sensor networks, where the communication medium is broadcast in nature and, hence, an adversary can overhear all messages sent by any user. For this reason, a sender must authenticate the receiver and encrypt any messages it sends. One way to achieve this authentication and encryption is to ensure that the sender and the receiver share a common secret that no other user in the network knows. Another important issue in these networks is multihop communication.