Blockchain-based Smart Contracts for Secure Data Distribution and Automation in Cloud-IoT Integrations

Abstract

The rapid integration of Cloud computing and the Internet of Things (IoT) has enabled large-scale data storage, real-time analytics, and automation across a wide range of applications. Nonetheless, centralized architectures in Cloud-IoT integrations are subject to serious issues related to data security, trust, transparency, and automated access control. This paper introduces a smart contract framework based on blockchain to distribute data and implement a computerized system in Cloud-IoT securely. The proposed solution can be achieved through blockchain, which provides a decentralized, tamper-resistant architecture, thereby guaranteeing data integrity, non-repudiation, and a clear transaction log between heterogeneous IoT devices and Cloud services. Smart contracts enforce policies of data sharing, authentication, authorization, and service-level agreements without using trusted third parties. The framework enables access control at a fine-grain scale and dynamic policy enforcement, which allows a safe and effective process of data exchange in multi-stakeholder ecosystems. Moreover, the off-chain Cloud storage with on-chain verification will resolve the issues of blockchain scaling and storage capacity and ensure security assurances. A qualitative relationship results in the proposed architecture taking a long step in enhancing trust, minimizing operational overhead, and limiting the common security threats, including data manipulation, unauthorized access, and single points of failure. The proposed solution provides a strong foundation for next-generation Cloud-IoT systems in applications such as smart cities, healthcare, industrial automation, and intelligent transportation systems.