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Blockchains and Smart Contracts for the Internet of Things

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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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A Decentralized Privacy-Preserving Healthcare Blockchain for IoT

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A Software Defined Fog Node Based Distributed Blockchain Cloud Architecture for IoT

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Blockchain and IoT Integration: A Systematic Survey.

TL;DR: The objective of this paper is to analyze the current research trends on the usage of BC-related approaches and technologies in an IoT context, and point out the main open issues and future research directions.
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A Blockchain Research Framework

TL;DR: An established research framework is adapted to structure the insights of the current body of research on blockchain technology, the present research scope as well as disregarded topics are outlined, and multidisciplinary research approaches are sketched out.
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An overview on smart contracts : Challenges, advances and platforms

TL;DR: This paper first introduces blockchains and smart contracts, then presents the challenges in smart contracts as well as recent technical advances, and gives a categorization of smart contract applications.
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