Mitigating Replay Attack in Wireless Sensor Network Through Assortment of Packets

There are many attacks possible on wireless sensor network (WSN) and replay attack is a major one among them and, moreover, very easy to execute. A replay attack is carried out by continuously keeping track of the messages exchanged between entities and replayed later to either bring down the target entity or affect the performance of the target network. Many mechanisms have been designed to mitigate the replay attack in WSN, but most of the mechanisms are either complex or insecure. In this paper, we propose a mechanism to mitigate the replay attack in WSN. In the proposed work at each node, assorted value of a received packet is maintained in a table and the reply attack is detected or mitigated using their assorted value of the already received packets. The proposed mechanism was simulated and its performance evaluated and it was found that the proposed mechanism mitigates the replay attack, secures the network and takes less time for processing.