Robust Group Authentication Using Quantum Cryptography and Smart Contract for IoMT

Medical risk management is a critical process within healthcare institutions that involves identifying, assessing, and mitigating risks to ensure patient safety and improve care quality. In recent years, the Internet of Medical Things (IoMT) has proved effective in monitoring patient health, particularly during disasters and epidemics such as COVID-19. However, the transmission of information over open channels makes such networks vulnerable to potential attacks. In addition, quantum computing presents a significant threat to current cryptographic algorithms. While existing solutions protect against well-known threats, few address the issue of quantum attacks. To address these challenges, this work presents an effective group authentication scheme for IoMT systems, leveraging post-quantum security using Kyber-PKE and Dilithium, Shamir’s secret sharing (SSS) algorithm, and smart contract. The proposed solution was simulated on the Ethereum platform and evaluated using Hyperledger Caliper, demonstrating its efficiency and scalability. A comparative analysis to recent pertinent works in terms of computation cost, power consumption, and security requirements shows that our system is well suited for various IoMT applications due to its robustness and efficiency.