###### Abstract  
The advancement and innovations in wireless communication technologies including the Internet of Things have massively changed the paradigms of health-based services. In particular, during the COVID-19 pandemic, the trends of working from home have been promoted. Wireless body area network technology frameworks help sufferers in remotely obtaining scientific remedies from physicians through the Internet without paying a visit to the clinics. IoT sensor nodes are incorporated into the clinical device to allow health workers to consult the patients' fitness conditions in real time. Insecure wireless communication channels make unauthorized access to fitness-related records and manipulation of IoT sensor nodes attached to the patient's bodies possible, as a result of security flaws. As a result, IoT-enabled devices are threatened by a number of well-known attacks, including impersonation, replay, man-in-the-middle, and denial-of-service assaults. Modern authentication schemes do solve these issues, but they frequently involve challenging mathematical concepts that raise processing and transmission costs. In this paper, we propose a lightweight, secure, and efficient symmetric key exchange algorithm and remote user authentication scheme. Our research proposal presents a successful privacy-protecting method for remote users and provides protection against known attacks. When compared to conventional options, this technique significantly reduces calculation costs by up to 37.68% and transmission costs by up to 32.55%. authentication; healthcare; IoT; key agreement; next-generation network; security +
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healthcare providers [8]. Effective healthcare ecosystems require collaboration and coordination between all the different entities such as patients, healthcare professionals, clinical devices, smart equipment, and limitless wireless sensors [9]. This includes sharing information, resources, and best practices to mitigate the affected person's consequences and decrease costs [10]. Some common characteristics such as equity, comprehensive services, adequate workforce, information systems, and infrastructure are crucial for healthcare ecosystems [11]. The goal of the healthcare ecosystem is to provide accessible, high-quality care to patients while also promoting innovation and efficiency [12]. IoT-based healthcare has the ability to enhance the affected person's results, lessen healthcare expenses, and improve the care quality [13]. However, it is essential to ensure that patient data are safe and healthcare providers have the necessary infrastructure and training to use the IoT effectively. A wireless sensor network (WSN) is a network of sensors that communicate wirelessly to perform various tasks such as monitoring, data collection, and control [14]. A sensor has low computing and communication powers that detect or measure a physical quantity such as temperature, pressure, or light intensity [15]. IoT-based wireless body area networks (WBANs) are a type of wireless network that involves using small, low-power sensors or devices placed on or inside a person's body to monitor various physiological and environmental parameters such as heart rate, temperature, blood pressure, and oxygen levels [16]. These devices communicate with a central hub or gateway that collects and analyzes the data and may also transmit the data to a remote location for further processing [17]. In healthcare, WBANs can be used to monitor patients' vital signs remotely, enabling doctors and caregivers to make real-time decisions about patient care [18]. One of the key challenges of WBANs is ensuring that the sensors are reliable and accurate, as well as ensuring that wireless communication is secure and private [19]. WBANs have a high chance of eavesdropping, man-in-the-middle (MITM), and impersonation attacks [20; 21]. Critical information about the patients is exchanged in healthcare applications. The malicious interest by way of an adversary could endanger the patient's life.