A survey of security in wireless sensor networks

Wireless sensor networks are spatially distributed sensor nodes that keeps the track of the physical or environmental conditions like sound, stress waves, temperature of surrounding etc, and also send the sensed data back to the sink or base station. WSN are used in many applications like military areas, disaster management in remote areas, in building smart cities etc. Therefore security is an important aspect in WSN. These networks can be prone to various disastrous attacks or hackers that has the motive to disrupt the entire network. In this article, various aspects of security in Wireless Sensor Networks has been observed like secure routing protocols, security at the node level in the network, cryptography etc.