Strengthening IoT Systems with Blockchain
Yingsen Wang, Jun Zhao, Yan Qiang, Juanjuan Zhao, Keqin Li · 2025
Through increased automation and efficiency, the Internet of Things (IoT) has a substantial influence on many different industries in the quickly changing digital world. But the growth of IoT networks also brings with it complicated security issues, especially with regard to cyber threats and data privacy. Blockchain technology ensures data security, immutability, and transparency, and it provides potential answers to these security problems with its decentralized and tamper-proof ledger system. This chapter examines many blockchain consensus techniques that are appropriate for IoT networks, with an emphasis on lowering processing costs and quickening consensus times. In this study, we look at how proof-of-X (PoX), practical byzantine fault tolerance (PBFT), directed acyclic graph (DAG), and block alliance consensus (BAC) can be used in resource-constrained IoT systems. We chose these consensus mechanisms because they represent a diverse range of approaches in terms of energy efficiency, scalability, and fault tolerance. We also present experimental results with performance comparisons, highlighting several parameters, such as average block time, length of the blockchain, and number of stale blocks. Our research highlights how crucial it is to combine blockchain technology with the IoT in order to handle data securely, scalable, and effectively. This will help to create IoT systems that are more reliable and robust.