LPA: A Lightweight PUF-based Authentication Protocol for IoT System

With the emergence of the Internet of Things (IoT), there come opportunities to connect people, data, and objects, bringing dynamic changes in our way of living. At the same time, the presence of sensors and other devices around us has created a leaky ecology that is webbed. It has turned into a risk for the users and causes worry about how widely it could be adopted. Numerous projects have been put up in a similar vein, creating innovations to improve security. But, conventional cryptographic solutions are difficult to embed as these IoT devices have limited resources. Physical unclonable functions (PUFs), particularly in resource-restraining devices, have shown to be valuable for developing authentication protocols. In this work, we propose a PUF-based authentication mechanism for IoT devices. This authentication protocol also performs the key exchange between the two nodes, with the server in between. The security features of the proposed mechanism are verified using AVISPA tool.