Abstract
As a disruptive emerging technology, the Internet of things (IoT) has rapidly developed, but its privacy risks and security vulnerabilities are still key challenges. The decentralized and distributed architecture of blockchain has the potential to satisfy IoT privacy and security requirements. This gives birth to the new domain of blockchain for IoT (BIoT). BIoT will cause significant transformations across several industries, paving the way for new business models. Based on the Science Citation Index Expanded (SCIE) and Social Sciences Citation Index (SSCI) databases in Web of Science (WoS) Core Collection, this study aims to explore the research trends and cooperation in the field of BIoT using the bibliometric method. The results indicate that the publications in this field have increased significantly from 2016 to 2020, with China and the USA being the most productive and influential countries. Keyword co-occurrence analysis shows that the most important research topics are as follows: security issues, core technologies, application dimensions, and transaction processes. Text mining analysis indicates that future research directions for BloT will focus more on both computing paradigms and key applications. This study will provide researchers with a greater understanding on the state of the art of BIoT and will serve as a reference for researchers engaging in this field to identify their own future research directions.
Highlights
Internet of things (IoT) applications have been rapidly increasing in recent years and are currently playing a key role in the development of society
We aim to provide a holistic vision of the research trends, the most concerned topic and existing research gaps in the field of blockchain for IoT (BIoT). e key contributions of this article lie in two main areas: on the one hand, based on the keyword co-occurrence analysis, the study explores the hot issues in the BIoT field
We explore the recent progress in the field of BIoT-related research based on bibliometric analysis of publications in 2016-2020
Summary
Internet of things (IoT) applications have been rapidly increasing in recent years and are currently playing a key role in the development of society. Through the connection of vehicles, household appliances, and other electronic devices to the Internet, IoT will create more comfortable living conditions for humans through many applications coming from various industrial domains such as smart home, smart healthcare, transportation, agriculture, retail, and wearable [1]. Most IoT solutions rely on a centralized server-client paradigm, which involves connecting to cloud servers through the Internet [3]. The major concerns regarding the development of IoT are security and privacy. In [6], it is pointed out that blockchainbased decentralized architectures provide solutions to the problem of IoT application security
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