Distributed Multiparty Key Management for Efficient Authentication in the Internet of Things

With the inclusion of mobile devices and ubiquitous connectivity of smart devices in Internet of Things, secure key management is mandatory to ensure privacy for information exchange. In this regard, the multiparty key establishment schemes achieve better security strength by taking shared parameters from neighboring member nodes to calculate the key. The similar multiparty mechanism can be adopted among other hierarchical nodes, including head node, server and gateway node. Moreover, session keys can also be set up in a similar manner. The main problem in multiparty password-based authentication schemes is the computation of extensively hard problem that limits it to three parties and N-party is quite more complex or infeasible. This paper presents a novel distributed multiparty keying scheme where chaotic maps are used to provide one-way hashing and Chebyshev polynomial are used for establishing a common multiparty key. In this paper, Phase-I covers keying among trusted server and group heads and Phase-II elaborates the key establishment among smart devices and their group heads. The scheme is verified through the formal specification and security analysis using Rubin Logic for inter-group key establishment scenario. We have validated the intra-group and inter-group key establishment by doing extensive simulations in NS 2.35. Moreover, a test bed is setup for group head to server level authentication and key establishment. Results prove the supremacy of our scheme as compared with preliminaries in terms of computation cost, communication cost, and resilience.