Review on: Authentication in Blockchain-Based Internet of Things

Technology's constant advancement has always had a big impact on a lot of different aspects of human life. Many developing technologies have a significant deal of room for disruptive improvements, particularly in the Internet of Things and blockchain domains. IoT system is made up of networked devices that can communicate, track, and be managed using unique IDs. The gadgets can connect wirelessly or weirdly to one another. These gadgets are diverse in kind. Implementing an IoT system raises security and privacy issues as typical security mechanisms do not work with IoT devices. The authentication and key management of IoT devices is one of their security vulnerabilities. Blockchain is a distributed ledger that aims to securely record transactional data by running entirely autonomously and openly. The effective development of trust between nodes offers a great deal of potential for innovative solutions for a range of commercial applications. This paper aims to introduce several blockchain-based IoT authentication methods. The layered architecture of the blockchain-IoT is represented in this study. The novelist then went over each authentication method utilized in BC-IoT.