Comparative Study on Distributed Signal Processing and its Security

Wireless sensor networks are spatially distributed sensor nodes that keep 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, environmental monitoring, smart spaces, medical applications, and precision agriculture [1][2] etc. Identifying opportunities and challenges for distributed signal processing in networks of these sensing elements and investigate some of the architectural challenges posed by systems that are massively distributed, physically-coupled, wireless  networked, and energy limited. Therefore security is an important aspect in WSN. These networks can be prone to various disastrous attacks or hackers that have the motive to disrupt the entire network. In this article, is a comparative study that focuses on distributed, wireless sensor networks in which the signal processing is distributed along with the sensing and  various aspects of security in Wireless Sensor Networks has been observed like secure routing protocols, security at the node level in the network level, cryptography etc.