Blockchain-Based Cloud Storage System with Enhanced Optimization and Integrity Preservation

Cloud storage system provides on-demand and pay-per-use storage models with low computing costs. However, this storage system suffers from various security risks. Blockchain technology is an advanced technique that stores data in a distributed manner, and once the data are stored, it cannot be altered. Therefore, a blockchain-based distributed architecture has been proposed in this paper for the cloud storage system. The proposed scheme utilizes the functionality of the smart contract to provide security features to the stored cloud data. The proposed scheme encodes the data before uploading it to the cloud server to achieve confidentiality. Furthermore, the proposed system includes an enhanced optimization technique and a challenge-response-based integrity checking mechanism, which provides a more secure cloud environment. The proposed technique also minimizes the system bandwidth cost using an enhanced fruit fly optimization algorithm that optimizes the node failure repair process. The experimental results and performance evaluation show that the proposed scheme is secured and reliable for the cloud computing environment.