Comprehensive Investigation of Blockchain-Based Access Control on the Internet of Things
Blockchain technology offers a potential solution for enhancing access control mechanisms in Internet of Things (IoT) environments. Conventional access control solutions face difficulties in terms of scalability, security, and interoperability, especially when dealing with the extensive and varied nature of IoT networks. The decentralised, irreversible, and transparent ledger system of blockchain provides a robust framework for tackling these challenges. This paper examines the incorporation of blockchain technology into IoT systems for the purpose of access control, with a specific emphasis on recent advancements and methodologies. We examined the benefits, which encompass enhanced security, reduced vulnerability to system failures, and improved openness. In addition, we analysed challenges such as scalability, processing overhead, and privacy concerns. This paper conducts a comprehensive analysis and evaluation of the current status of blockchain-based access control on the Internet of Things (IoT). Its purpose is to provide researchers with a thorough understanding of the topic, including various approaches, models, standards, platforms, and potential applications for implementing blockchain-based access control in IoT. Out of the total of 207 papers, a subset of 72 were chosen for additional study, by applying the inclusion and exclusion criteria. The selected papers were evaluated and summarized to highlight their respective strengths and weaknesses. Moreover, the study examined the suitability and occurrences of using blockchain technology for access control in IoT devices. In the end, the discussion included challenges, potential areas for research, and an explanation of how blockchain technology can be used for access management on the IoT.