A Survey on Blockchain-Based Trust Management for Internet of Things

Internet of Things (IoT) aims to create a vast network with billions things that can seamlessly and exchange data, establishing intelligent interactions between people objects around them. It is characterized openness, heterogeneity, dynamicity, which inevitably introduce severe security, privacy, trust issues hinder the widespread application IoT. Trust management (TM) holds great promise in identifying malicious nodes, maintaining relationships, enhancing system security. Traditional TM systems (TMSs) be classified into centralized, semi-centralized, distributed ones, all three suffer from critical challenges thus are not sufficient for facilitating IoT development. Blockchain, as disruptive technology, help addressing IoT, thanks its advanced features, such decentralization, consistency, tamper-proofing. As result, blockchain-based (BC-TM) has been extensively studied recent years achieve decentralized However, it still lacks comprehensive survey on current state arts. To fill this gap, article, we conduct serious BC-TM We first propose set evaluation criteria should met by TMS Then, taxonomy TMSs continue thorough review employing proposed criteria. In end, based review, series open identified, future research directions suggested.