As computing technology becomes more tightly coupled into dynamic and mobile world of the Internet of Things (IoT), security mechanism becomes more stringent, less flexible and intrusive. Scalability issue in the IoT makes Identity Management (IdM) of ubiquitous things more challenging. Forming ad-hoc network, interaction between these nomadic devices to provide seamless service extend the need of new identities to the things, addressing and IdM in the IoT. New identities and identifier format

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... o alleviate the performance issue is introduced in this paper. This paper presents novel Context-aware Clustering with Hierarchical Addressing (CCHA) scheme for the things with new identifier format. Simulation results shows that CCHA achieves better performance with less energy expenditure, less end-to-end delay and more throughput. Results also show that CCHA significantly reduces the failure probability. Furthermore, this paper also presents the framework for IdM in the IoT and mathematical model for queuing analysis.