SecSmartLock: An Architecture and Protocol for Designing Secure Smart Locks

Abstract

The Internet of Things (IoT) has become widespread in home to industrial environments. Smart locks are one of the most popular IoT devices that have been in use. Smart locks rely on smartphones to ease the burden of physical key management. Concerns that include privacy risks as well as access through unreliable devices have been raised regarding smart locks. A number of attacks have been identified based on the weaknesses in the system design of the smart locks. For example, several security vulnerabilities have been found in one of the popular architectures for smart locks called DGC (Device-Gateway-Cloud) architecture. Efforts have also been made to mitigate these attacks as much as possible. In this paper, we propose a new smart lock framework called SecSmartLock, that overcomes the above attacks and thus, prevents the possibility of unauthorized access to the user’s premises. The proposed framework includes an architecture along with a secure communication protocol that can be used to implement marketable smart locks and server as fundamental guidelines to enhance the future research on secure smart locks. We establish proof of security of the proposed smart lock architecture and protocol. To demonstrate the practicality of our approach, we have implemented a prototype smart lock simulated using an Android smartphone along with a companion Android application. Advantages of our approach over other approaches follow from our comparison with other prominent solutions in the literature. We also highlight our implementation along with its’ performance.