Anonymous Group-Oriented Time-Bound Key Agreement for Internet of Medical Things in Telemonitoring Using Chaotic Maps

Telemonitoring using the Internet of Medical Things (IoMT) enables the seamless communication of physical signs from patients who do not visit healthcare providers. It, therefore, improves the efficiency of healthcare services and patient comfort the quality of life of patients. While providing many benefits, it is associated with challenges concerning energy consumption, privacy, and security. This work addresses those challenges by presenting a new group-oriented time-bound-authenticated key agreement scheme using extended chaotic maps. It provides details on the importance and contribution of this work, investigates the scheme of Chien, and elucidates its weaknesses. The security of the proposed scheme is analyzed formally using the Burrows–Abadi–Needham logic and informally through informal discussions about security features, possible attacks, and countermeasures. Results of a simulation demonstrate that the proposed scheme has more security functions and is more computationally efficient than other related schemes.