Date Added: Oct 2009
The main objective of this work is to minimize the intrusion attacks without causing a significant impact on energy consumption. One of the proposed methods was the NEighborhood-based Key Agreement Protocol (NEKAP). It could provide an authentication in a wireless sensor network. Unfortunately, adversaries may launch a replay attack though the loophole of NEKAP to successfully masquerade legitimate nodes and thereby compromise the communications over the network. In this paper, the authors present a modified security protocol for wireless sensor networks. Similarly to NEKAP, the authors design and provide four types of keys for each node, which adapt to different security requirements.