Wireless sensor networks: Routing protocols and security issues

Wireless Sensor Network (WSN) is a wireless network consists of large number of sensor nodes. Routing protocols are used for communication in the network. Routing protocols discover the appropriate path to transmit the data and maintain the routes in the network. Many routing techniques in WSNs have been proposed. But without security, the use of these protocols becomes limited. Providing a secure communication between nodes is also an important task. In this paper, the classification of routing protocols with comparison is analyzed. This paper also study the various security threats on routing protocols of wireless sensor networks and some defense techniques are also mentioned.