An RSA-Based User Authentication Scheme for Smart-Homes Using Smart Card

Internet of Things (IoT) is an emerging paradigm which enables physical objects to operate over the Internet, collect and share the data that describe the real physical world. One of its greatest opportunity and application still lies ahead in the form of smart home, known as push-button automated home. In this ubiquitous environment, due to the most likely heterogeneity of objects, communication, topology, security protocols, and the computationally limited nature of IoT objects, conventional authentication schemes may not comply with IoT security requirements since they are considered impractical, weak, or outdated. Focusing only on the issue of remote authentication in a smart home environment, in the presence of security threats, this paper proposes the design of a RSA-based two-factor user Authentication scheme for Smart-Home using Smart Card (denoted RSA-ASH-SC scheme). An informal security analysis of the proposed RSA-ASH-SC scheme is proposed as well as a study of its performance in terms of convergence speed, showing that the RSA-ASH-SC scheme is about 50% faster than the Om and Kumari scheme, and about 15 times faster than selected RSA variants in terms of RSA decryption speed when the RSA key length is 2048. The RSA-ASH-SC scheme is also shown to maintain the anonymity of the user using a one-time token.