A Scalable Blockchain Framework for Secure Transactions in IoT-Based Dynamic Applications

The essential characteristics of blockchain, such as immutability and auditability, are leading to its increasing incorporation into society. The Internet of Things (IoT) aims to create a decentralized framework for IoT and enhance security. The processing of transactions for different IoT applications poses challenges for the convergence of IoT and blockchain due to varying performance requirements. In addition, it is important to note that the dispersed IoT system’s membership may change when an IoT device adds or departs from it. As the system becomes dynamic, it presents new difficulties for managing devices. Accordingly, a dynamic application block generation (DABG) scheme for blockchain-enabled IoT with dynamic device management and conditional traceability is proposed. To begin, it is necessary to construct a framework for an IoT system based on a consortium blockchain. This framework should consist of structures for dynamic application transactions and blocks, as well as a consensus mechanism. Miners are presented in distinct ways to adaptively process urgent and routine application transactions. A protocol based on group signature, known as DABG, is proposed for this framework. It is possible to achieve nonframeability, traceability, and anonymity by the use of the group signature. The suggested method may quickly validate transactions, manage devices in a dynamic manner, enable conditional traceability while maintaining data security, and keep users’ privacy intact. This is made possible by merging time-bound keys in the group signatures and node in the blockchain. Extensive testing has shown that the strategy in question has the potential to achieve very high levels of effectiveness.