![]() Industrial IoT (IIoT) takes benefits of IoT communications in business applications focusing in interoperability between machines (i.e., IIoT is a subset from the IoT). ![]() Communication between humans and objects has been extended into those between objects and objects. Physical world integration with cyber world opens the opportunity of creating smart environments this new paradigm is called the Internet of Things (IoT). We also show the potential of blockchain technology in revolutionizing healthcare industry. In this inquiry, we call attention to the open research matters in this fast-growing field, explaining them in some details. This survey provides a comprehensive review of emerging blockchain-based healthcare technologies and related applications. The dramatic increase in blockchain technology has provided many new application opportunities, including healthcare applications. In the last couple of years, the upsurge in blockchain technology has obliged scholars and specialists to scrutinize new ways to apply blockchain technology with a wide range of domains. It is a chain of blocks that covers information and maintains trust between individuals no matter how far they are. Blockchain technology moves in the direction of persistent revolution and change. One of the most important discoveries and creative developments that is playing a vital role in the professional world today is blockchain technology. Finally, we outline the open research directions in this promising area. We further discuss the issues about using blockchain for 5G beyond in IoT as well as industrial applications of BCoT. We next concentrate on introducing the convergence of blockchain and IoT and presenting the proposal of BCoT architecture. Then we give an overview of blockchain technology. In particular, we first briefly introduce IoT and discuss the challenges of IoT. This paper presents an in-depth survey of BCoT and discusses the insights of this new paradigm. We name such synthesis of blockchain and IoT as Blockchain of Things (BCoT). In this paper, we investigate the integration of blockchain technology with IoT. Blockchain technology brings the opportunities in addressing the challenges of IoT. However, intrinsic features of IoT result in a number of challenges such as decentralization, poor interoperability, privacy and security vulnerabilities. Internet of Things (IoT) is reshaping the incumbent industry to smart industry featured with data-driven decision-making.
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