Enhancing Cloud Data Security With Blockchain

In the rapidly evolving field of cloud computing, data security is a significant concern due to thevulnerability of centralized key management and potential unauthorized ac- cess. This paper introduces anovel two-phase solution aimed at enhancing cloud data security through dynamic encryption andblockchain-based key management. The first phase utilizes dynamic Advanced Encryption Standard (AES)encryption, where unique keys are generated for each file, ensuring robust file-level security. In the secondphase, blockchain technology is employed to securely store encryption keys, maintaining data integrity anddecentralized control. Elliptic Curve Cryptography (ECC) further strength- ens security during transmissionand file sharing. By integrating dynamic AES encryption with blockchain key management, this approachaddresses the limitations of traditional cloud security methods, offering enhanced protection against keycompromise and unau- thorized access. The proposed solution is scalable and adaptable, making it a valuableasset in ensuring data security in modern cloud infrastructures.