Lattice-Based Three Party Authenticated Key Agreement Scheme in Medical IoT for Post-Quantum Environment

Rapid advancement in Internet of Things(IoT) changes the way people work and live deliberately. Medical IoT (MIoT) is a highly significant application in the world of IoT, allowing the user to communicate with smart medical devices with the help of a hospital gateway node. To establish a private communication channel, a three-party authenticated key agreement (AKA) technique using public-key cryptography is used. Currently, the AKA algorithms used in MIoT are based on classical cryptography such as ElGamal, RSA, ECC, etc. All of these techniques have become obsolete in the post-quantum environment as the Shor algorithm can solve these techniques on quantum computers. To overcome the problem stated above, a scheme called Lattice based Three party authenticated key agreement scheme in Medical IoT is proposed to accomplish security and efficiency in a post-quantum environment. Formal and informal security analysis is given to authenticate the protocol’s security. Also, the security analysis is conducted formally with the help of the Random Oracle Model (ROM) and ProVerif tool. The suggested scheme is compared to existing schemes in terms of security features, computing costs, and communication costs to evaluate the system’s performance. It validates that the suggested scheme exceeds the existing schemes.