Signal Strength Based Hello Flood Attack Detection and Prevention in Wireless Sensor Networks
Wireless sensor network is a highly distributed network of small lightweight wireless sensor nodes, deployed in large numbers to monitor the environment or system. These sensor networks have limitations of system resources like battery power, radio range and processing capability. Low processing power and wireless connectivity make such networks vulnerable to various attacks like sink hole, black hole, Sybil attacks, selective forwarding, worm hole, hello flood etc. Among these hello flood attack is an important attack on the network layer, in which an adversary, which is not a legal node in the network, can flood hello request to any legitimate node using high transmission power and break the security of WSNs.