An Efficient Security Scheme Providing Authentication and Pairwise Key Distribution with Mobile Sinks in Wsn’s

Sensor networks may be deployment in hostile environments, especially in military applications. Small low cost sensor devices each equipped with limited resources are networked and are used for various critical applications. Making such sensor network secure is a challenging issue. Under such situations, the sensors may be captured, and the data may be intercepted and/or modified by the attacker. Therefore security services such as authentication and pair wise key establishment is a critical issue to maintain network operations. In the traditional schemes an attacker can easily obtain large number of keys by capturing small fraction of nodes and initiate data communication with any sensor node. Here the main focus is on the sensor network that uses mobile sink to gather the sensed data from the network. A new security techniqueThree tier security scheme is proposed to provide authentication and pair wise key establishment between sensor nodes and mobile sinks. The proposed scheme makes use of two polynomials pools: static polynomial pool and mobile polynomial pool which will improve network resilience to the mobile sink replication attack.