Mujiba Shaima¹, Md Nasir Uddin Rana¹, Md Tanvir Islam¹, Norun Nabi²
MazharulIslam Tusher¹, Estak Ahmed¹, Sushanta Saha¹ and Sarder Abdulla Al Shiam³, ¹Monroe College, USA, ²Washington University of Science and Technology(WUST), USA, ³St Francis College, USA

IoT, or the Internet of Things, describes a network of networked objects that are equipped with software, sensors, and other technologies to gather and share data. However, blockchain is a distributed ledger technology that makes it possible to record transactions over a network of computers in a safe, transparent, and unchangeable. The way that blockchain and IoT can enhance each other's advantages is how they are connected: Blockchain technology, with its decentralized and impenetrable ledger, offers safe and effective storage and transfer of the massive volumes of data generated by Internet of Things devices. Organizations may guarantee the security and integrity of IoT data by incorporating blockchain technology into IoT systems. This will allow for reliable and open communications and transactions between users and devices. Here, we summarize the current body of research and draw attention to the main cybersecurity issues facing blockchain-based Internet of Things platforms. These problems are divided into three primary categories: (i) security of IoT devices; (ii) security of blockchains; and (iii) integration of IoT devices with blockchain (network security). To further address a little about these issues and improve the cybersecurity of blockchainbased IoT systems, we also analysis future research directions.

IoT, Blockchain, Blockchain Layer, Hash Identification