Quantitative Security and Efficiency Analysis of SEAR in Wireless Sensor Networks
SEAR is a novel secure and energy aware routing protocol proposed to address the energy balance and routing security through a balanced energy consumption and probabilistic random walking. Recently, a quantitative security measurement scheme for source-location privacy based on Source-location Disclosure Index (SDI) and Source-location Space Index (SSI) has been proposed. In this paper, the authors first derive a numerical formula to quantitatively estimate the routing efficiency through the number of routing hops for a given routing security level. They, then consider the reverse problem: for a given routing cost factor, how to determine the maximum security level for a message to be transmitted.