The design of a secure three factor authentication protocol for wireless sensor networks

A Wireless Sensor Network (WSN) is a group of specialized sensors with a communications infrastructure for monitoring and recording conditions at diverse locations. In WSN's to access the real time data from the sensor nodes a proper user authentication technique is required before allowing the users to access the data. In 2015 A.K. Das has proposed a user authentication technique with three factors consisting of Smart card, Password and Biometric. In this paper we have identified the vulnerabilities in A.K. Das scheme and we have proposed a modified authentication scheme. We have used formal security analysis and informal security analysis to demonstrate that our scheme is more secure when compared with the related schemes.