The Internet of Things (IoT) represents an evolutionary vision and a new era of such smart environments that encompass all identifiable things in a dynamic and interacting network of networks. Each user has wide interactions with a huge number of entities. It would be impractical to require users to confirm themselves every time they cross various network boundaries, as the frequent verification process would disrupt the users' normal activities and degrades the overall performance. This paper presents a service provisioning framework for IoT that relies on verifying user identity using a non-intrusive method of monitoring and inferring certain types of user activities. The framework helps in supporting the purpose of the IoT for being smart, boundless, easier and safer to improve people's lives. The proposed framework reduces the risk of identity theft that results from losing user devices, where the user identity is usually stored. It copes with the loss of the user's ID or people impersonating other people, and raises an alarm to block an intruder from being verified as a legitimate user.
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