SPER: A Safe and Power-Efficient Routing Algorithm in Wireless Sensor Networks

Routing protocols play an important role in WSNs in order to gather data and send them to the BS (base station). One of the challenges that the WSNs have to face is to prolong its lifetime since transmitting and receiving interest information are the most energy exhausting phase. In this paper, we introduced a new routing algorithm called SPER (safe and power -efficient routing algorithm in wireless sensor networks) which is enlightened by PEGASIS (power-efficient gathering in sensor information systems). At the same time in SPER we gave out a novel formula to compute the value of weight in which energy consuming factor was introduced considering the power balance problem. Based on the multiple chains structure, a method of cipher keys distribution was designed. A symmetric public key formally installed in the sensors was used to encrypt the initial process. In each data aggregating rounds different cipher keys were used to enhance the security of the whole net.