Blockchain-Based Secure Data Sharing for IoT Applications

The swift expansion of Internet of Things (IoT) applications has brought forth considerable challenges in securing data transmission and safeguarding privacy. Conventional centralized data-sharing methods are vulnerable to single points of failure, unauthorized access, and data manipulation. This paper investigates a blockchain-based strategy for securing data sharing within IoT networks. The decentralized and immutable characteristics of blockchain bolster data integrity, confidentiality, and access control. The proposed framework utilizes smart contracts to automate data sharing and enforce access policies, ensuring that only authorized individuals can retrieve the data. Additionally, cryptographic methods such as hashing and digital signatures offer further security enhancements. Performance assessments indicate that the blockchain-based approach enhances data privacy, minimizes unauthorized access, and fosters trust among IoT devices. The research underscores that the integration of blockchain with IoT significantly improves data security and establishes a dependable and scalable data-sharing framework, making it suitable for real-time applications in smart homes, healthcare, and industrial automation.