Techniques to Alleviate Sybil Attack and Security Issues in Wireless Sensor Network

Abstract-It is quite a difficult task to achieve security in a wireless sensor network because sensors have limited battery backup, dynamically changing topology, lack of central management and infrastructure. A particular harmful attack that takes the advantage of these characteristics is the Sybil attack.Sybil attack, in which a single malicious node illegitimately claims multiple identities. This attack can extremely disrupt various operations of the wireless sensor networks such as voting, data aggregation, data replication and data fragmentation, fair resource allocation scheme, misbehavior detection and routing mechanisms