Innovative strategies for IoT security using AI and blockchain: a comprehensive review

The Internet of Things (IoT) is an emerging technological revolution, where devices communicate with each other over the internet to receive communications and information. These devices generate massive amounts of information. As industries increasingly rely on IoT devices, the need for technologies to enhance data security and privacy has emerged. This data faces significant security challenges, such as cyberattacks or data tampering. Therefore, it is imperative to develop effective protection for this data. This study aims to review the role of artificial intelligence (AI) and blockchain technology in enhancing IoT security by integrating these two technologies. The combination of AI and IoT represents a tremendous revolution in the rapidly evolving field, given its ability to simplify tasks easily and efficiently. AI analyzes and classifies data, detects threats and malicious attacks, while blockchain technology provides an additional layer of protection for the IoT through decentralized storage that prevents data tampering and ensures its integrity and confidentiality. In this study, we present a structured and systematic review of research published between 2021 and 2025, focusing on the role of AI and blockchain in securing IoT data. The results demonstrate that integrating AI with blockchain technology improves IoT security by detecting attacks early, reducing vulnerabilities, and preventing unauthorized access or data tampering. However, the evolving nature of attacks and challenges calls for further research to find or develop solutions capable of addressing future challenges to ensure security and reliability in data exchange between devices.