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Open AccessJournal ArticleDOI

Blockchains and Smart Contracts for the Internet of Things

TLDR
The conclusion is that the blockchain-IoT combination is powerful and can cause significant transformations across several industries, paving the way for new business models and novel, distributed applications.
Abstract
Motivated by the recent explosion of interest around blockchains, we examine whether they make a good fit for the Internet of Things (IoT) sector. Blockchains allow us to have a distributed peer-to-peer network where non-trusting members can interact with each other without a trusted intermediary, in a verifiable manner. We review how this mechanism works and also look into smart contracts—scripts that reside on the blockchain that allow for the automation of multi-step processes. We then move into the IoT domain, and describe how a blockchain-IoT combination: 1) facilitates the sharing of services and resources leading to the creation of a marketplace of services between devices and 2) allows us to automate in a cryptographically verifiable manner several existing, time-consuming workflows. We also point out certain issues that should be considered before the deployment of a blockchain network in an IoT setting: from transactional privacy to the expected value of the digitized assets traded on the network. Wherever applicable, we identify solutions and workarounds. Our conclusion is that the blockchain-IoT combination is powerful and can cause significant transformations across several industries, paving the way for new business models and novel, distributed applications.

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Citations
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Journal ArticleDOI

A blockchain-based eHealthcare system interoperating with WBANs

TL;DR: A blockchain-based eHealthcare system interoperating with wireless body area networks (WBAN) has been proposed, which utilizes the WBAN to network the devices of the patients and the blockchain technology as the data transmitting and storage method.
Proceedings ArticleDOI

ChainSplitter: Towards Blockchain-Based Industrial IoT Architecture for Supporting Hierarchical Storage

TL;DR: In this paper, a hierarchical blockchain storage structure, ChainSplitter, is proposed to support immutable and verifiable services in the Industrial Internet of Things (IIoT) infrastructures, where the majority of the blockchain is stored in the clouds, while the most recent blocks are stored in an overlay network of the individual IIoT networks.
Journal ArticleDOI

Blockchains Can Work for Car Insurance: Using Smart Contracts and Sensors to Provide On-Demand Coverage

TL;DR: A prototype that includes a mobile application and a portable electronic device to be installed onboard to semiautomatically activate/deactivate car insurance coverage in an envisaged on-demand insurance scenario is presented.
Proceedings ArticleDOI

IoT Data Integrity Verification for Cyber-Physical Systems Using Blockchain

TL;DR: This work proposes an architecture that can take advantage of blockchain features to allow further integrity verification of data produced by IoT devices even in the realm of CPS, and a performance evaluation of the critical path of data to demonstrate that the architecture respect time-bounded operations demanded by the sense-decide-actuate cycle of CPSs.
Journal ArticleDOI

A Collaborative Intrusion Detection Approach Using Blockchain for Multimicrogrid Systems

TL;DR: A new collaborative intrusion detection (CID) approach using blockchain is proposed in this paper for MMG systems in smart grid, which is designed without the need of a trusted authority or central server while improving the accuracy of intrusion detection in a collaborative way.
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