A Systematic Review on Blockchain in IoT

Abstract

The IoT has greatly evolved and is drawing a lot of attention from academics and industries. Unfortunately, due to a lack of standard safety methods, IoT privacy concerns and security flaws have ascended. The current model of the IoT relies on a centralized cloud server, resulting in single-point failures. The blockchain method was introduced as a decentralized method to ensure security standards and linked to IoT owing to its decentralization and information disclosure. In the present study, initially, the basic structure of blockchain is explained following the integration of IoT with blockchain. The review of the wide-ranging hierarchy of blockchain-IoT applications across multiple segments defined as a systematic and operational content analysis of the scholarly papers is done. The foremost blockchain-based IoT applications are described in order to stimulate the functionalities and benefits of the blockchain approach on IoT systems.