LAKA: Lightweight Authentication and Key Agreement Protocol for Internet of Things Based Wireless Body Area Network

The concept of wireless body area network (WBAN) is conquered the medical field while considering hospitals, patients, doctors to exchange crucial health data for efficient medical services. Health data includes personal medical information of patients, quality of life, reproductive outcomes, and behavioral information. While transferring health data for medical treatment/review, it is essential to provide proper security during device-to-device communication among WBAN players. Researchers have suggested different health data transmission mechanisms to achieve security, but these schemes are weak against various security attacks, such as modification, session key disclosure, impersonation, replay, man-in-the-middle, and stolen smart card, making crucial information in a susceptible situation specifically for patients. Further, they require high computational resources during WBAN communications. In this paper, we propose a secure and lightweight health authentication and key agreement protocol using low-cost operations. To confirm the robustness of the proposed mechanism, we do security analysis against various security attacks. Based on the computational analysis, the proposed protocol comparatively takes less execution cost, computation time, and power consumption. Moreover, LAKA requires around 57% less communication overhead and 15% less storage cost.