Fuzzy controller for a dynamic window in elliptic curve cryptography wireless networks for scalar multiplication

The rapid progress of wireless communications and embedded micro-electro-mechanical systems technologies has made wireless sensor networks (WSN) possible. However, the security of the WSN becomes one of the major concerns in its applications. Elliptic curve cryptography (ECC) prominently provides solid potential for wireless sensor network security due to its small key size and its high security strength. However, there is a urgent need to reduce key calculation time to satisfy the full range of potential applications, in particularly for those applications involved wireless sensor networks (WSN). It is well known that scalar multiplication operation in ECC accounts for about 80% of key calculation time on wireless sensor network motes. In this paper we present a fuzzy controller for a dynamic window sizing to allow the calculation processing to run under optimum conditions by balanced case allocating available RAM and ROM at the sensor node within a wireless sensor network. The whole quality of Service (QoS) is improved, in particular the power consuming is more efficiently. The simulation results showed that the average calculation time decreased by approximately 15% in comparison to traditional algorithms in an ECC wireless sensor network.