A Blockchain-Assisted Multifactor Authentication Protocol for Enhancing IoMT Security

This article presents a novel approach to enhancing the Internet of Medical Things (IoMT) security. A blockchain-based multifactor authentication protocol is designed to address significant security challenges of all the existing IoMT applications. To address security issues, such as preserving patient data privacy and vulnerable or compromised medical devices, we introduced a model in which IoMT devices communicate securely with less time and low-energy consumption. The formal verification of the proposed scheme is rigorously done by using two popular tools, ProVerif and BAN logic, and our model can resist the exploitation of vulnerabilities, thereby preventing the launching of attacks. Gas costs for registration and authentication are 600115 and 253517, respectively. Furthermore, using Slither tool we finds no vulnerabilities in the smart contract using 95 detectors. The proposed approach’s computation and communication overheads are compared with some existing competent schemes, and it is found that IoMT devices based on our model take less time for computation and communication. Moreover, the proposed scheme is based on elliptic curve cryptography and consumes less energy. Thereby suitable for working in a resource-constrained environment. The security analysis of the proposed scheme shows that it can withstand many passive and active attacks. Hence, the proposed approach can be applicable to healthcare applications with trust and reliability.