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Title	Microchain: A Light Hierarchical Consensus Protocol For Iot Systems
ID_Doc	36975
Authors	Xu R.; Chen Y.; Blasch E.
Year	2021
Published	EAI/Springer Innovations in Communication and Computing
DOI	http://dx.doi.org/10.1007/978-3-030-65691-1_9
Abstract	While the large-scale Internet of Things (IoT) makes many new applications feasible, like Smart Cities, it also brings new concerns on data reliability, security, and privacy. The rapid evolution in blockchain technologies, which relied on a decentralized, immutable, and distributed ledger system for transaction data auditing, provides a prospective solution to address many issues for IoT security. The blockchain and smart contract enabled security mechanism for IoT applications have attracted increasing interests from both academia and industry. However, integrating cryptocurrency-oriented blockchain technologies into IoT systems meets tremendous challenges on scalability, storage capacity, security, and privacy. Particularly, the performance of blockchain networks significantly relies on the performance of consensus mechanisms, e.g., in terms of data confidentiality, transaction throughput, and network scalability. In this chapter, following an in-depth review of state-of-the-art blockchain networks, the key matrix of designing consensus mechanism for IoT networks are identified in terms of throughput, scalability, and security. To demonstrate a case study on designing scalable, lightweight blockchain protocols for IoT systems; a Microchain framework is introduced and a proof-of-concept prototype is implemented in a physical network environment. The experimental results verify the feasibility of integrating the Microchain into IoT systems. © 2021, Springer Nature Switzerland AG.
Author Keywords	Blockchain; Consensus; Internet of Things (IoT); Security

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