Wireless and sensors network security threats and countermeasures

Wireless sensor network is domain-specific wireless system composed of various nodes called sensor nodes. The purpose of the nodes is to collect physical and environmental data parameters such as sound, pressure and temperature, and relay the data across the network through a central node. The goal is to get the data from the sensors in a secure manner. Data flow in wireless sensor networks is threatened by a variety of attack types, including Sybil, Wormhole, Sinkhole, and others. In order to accomplish privacy, integrity, availability, confidentiality, a number of protocols and techniques have been developed. In this paper we will provide a systematic review that spots the light on the common threats and the countermeasures proposed by the previous studies