Abstract

Cloud storage systems have revolutionized how data is stored, accessed, and managed in today's digital landscape. With the rapid growth of digital information and the increasing reliance on remote access and collaboration, traditional local storage solutions still need to be improved in meeting the demands of modern businesses and individuals. In traditional cloud storage systems, attribute-based encryption (ABE) has emerged as a significant technology for addressing data privacy challenges and fine-grained access control. However, attribute-based encryption (ABE) schemes, while effective in data privacy and access control in cloud storage systems, suffer from inherent limitations. Specifically, in all ABE schemes, the private key generator (PKG) processes the authority to encrypt all data stored in the cloud server. This centralized decryption capability introduces potential risks, including the abuse of encryption keys and the potential leakage of sensitive data. Moreover, the traditional cloud storage model operates in a centralized storage manner, making it susceptible to single points of failure that can result in system-wide disruptions or collapses. These issues highlight the need for alternative approaches that mitigate the risks associated with centralized decryption and single points of failure, ensuring enhanced security and reliability in cloud storage systems. Blockchain technology has brought decentralized storage models to the forefront of public attention. Decentralized storage systems offer a viable solution to address the inherent vulnerabilities of single points of failure found in traditional cloud storage architectures. Moreover, decentralized storage exhibits numerous advantages compared to centralized storage, including cost-effectiveness and enhanced data throughput capabilities. By leveraging the principles of blockchain technology, decentralized storage systems present a promising alternative that can potentially revolutionize how data is stored, accessed, and managed. This research paper studies the paradigm of blockchain-based decentralized data storage systems and compares them with traditional cloud centralized storage systems. The study begins with an exploration of the background and significance of data storage, highlighting the need for advanced storage solutions. The research objectives include examining the principles, architecture, and challenges of blockchain-decentralized storage systems, along with their advantages over cloud centralized storage. This paper mainly contributes to the understanding of blockchain decentralized storage systems and their potential impact on data storage practices.

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