Abstract:
The emergence of the IoT technology has garnered significant interest in recent years, with its ability to integrate multiple sensors and nodes for seamless interconnectivity without human intervention. The three layers of the IoT system, namely the physical perception layer, network layer and application layer, require secure mechanisms to guarantee the end-to-end integrity of the data and interactions across these levels. However, IoT applications face several security challenges, which this paper aims to address. By conducting an extensive review of existing works on IoT security and blockchain technology, this paper shows a comprehensive analysis of the security matters in each layer of the IoT architecture. In addition, it highlights the potential of blockchain technology as a promising solution to address these security issues. Furthermore, this paper delves into the different aspects of IoT security, such as scalability, interoperability, distributiveness, resource scarcity and security concerns. As of yet, there is no particular reference architecture for the IoT, and creating a new one is a complex process, despite various standardization efforts. Nonetheless, this paper presents the three common IoT architectures that are currently in use. Overall, the goal of this survey is to deliver a comprehensive overview of the security challenges faced by the IoT and the potential of blockchain technology to make a secure and reliable solution.
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