Gadget Free Authentication

One of the major trends in the development of the Internet is the one of ambient Internet of Things (IoT) and even more ambient Internet of Everything (IoE). In this case, the user seamlessly interacts with various systems and devices, which automatically adapt to the user's needs based on the surrounding context. To even further enhance the user experience, a gadget‐free or also called Naked‐approach scenario is considered, where the user is able to experience the services without carrying any gadget. We present in this chapter a use case from the medical and healthcare sector using such a Naked approach, enabling an ambient IoE experience for the patient. Through direct interaction with the environment, using biometrics‐based authentication and symmetric key‐based operations, the patient is identified and is able to perform confidential and authenticated communication. A concrete and total security solution is presented, together with a discussion on the strength against well‐known attacks. The performance analysis of the scheme shows the feasibility of the proposed approach.