A novel token-based authentication algorithm for DoS attacks in wireless sensor network.

In Wireless sensor networks (WSN) tiny sensor nodes are deployed in remote locations to collect information like temperature, moisture level, water level etc in the selected area. Information collected by sensor nodes is highly sensitive and vulnerable to different security attacks including Denial of Service (DoS) attack. Due to resource constraints providing security to the WSN is a difficult task. Successful authentication schemes used in wired networks are not suitable for WSN. Most of the available authentication schemes use more computations for encryption and decryption. This paper proposes a novel token-based authentication algorithm to provide security against Denial of Service attacks. The proposed algorithm has three different phases namely Registration phase, Authentication phase and New token creation phase to preserve user anonymity and provide secure authentication against DoS attacks. A simple private key based cryptography algorithm with minimal computation has been used for encryption and decryption which makes this algorithm more suitable for WSN. [ABSTRACT FROM AUTHOR]