Date of Publication :7th May 2015

Abstract: Wireless Sensor Networks (WSN) are combination of several thousand sensor nodes that have several capabilities such as to detect, to sense, to monitor, to process and to compute. WSN have many applications in real time scenarios such as in military, industries, health care and so on. WSN has infrastructure less structure, so the ability to cope with the node failure, fault tolerance and its security attack are the main concern. The sensor nodes are more vulnerable to security threats and attacks because of the harsh and hostile environment. Efficient implementation of different security protocols has huge impact to adverse the potential threat. The main aim of this paper is to present security issues and challenges faced by WSN. This paper explains attacks in WSN, its flaws and their countermeasures that can be used to handle the pitfall.

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