Two-Tier Energy-Efficient Secure Scheme for Wireless Sensor Networks

Wireless Sensor Network (WSN) is mainly concerned with energy efficiency and security. Power exhausting attacks such as denial of sleep shortens the lifetime of WSN rapidly. Some of the MAC protocols are proposed to protect the sensor networks and extend its lifetime. The existing security mechanism awakes the sensor nodes before the security processes are allowed to execute. The work aims to authenticate the process by reducing the energy consumption of sensor nodes and enhances the performance of MAC protocols for power exhausting attacks. The scheme aims at replaying the attack in an efficient way. The reduced energy consumption is the coordination between energy conserved and security requirements for the sensor network application. The elaborated analysis of energy distribution shows a reasonable decision rule for coordination between energy conserved and security needs for wireless sensor networks. By combination of low complex secure method and multiple check points, the proposed design can defense against DOS attacks.