International Journal of Scientific Research and Engineering Development

The system is developed using Java-based technologies and provides a secure cloud data storage and sharing framework through a web-based interface. It integrates key components such as user authentication, file upload, SHA-256 hashing, encryption, and identity-based data sharing to ensure data protection. The SHA-256 algorithm generates unique hash values for files, enabling data integrity verification and detection of unauthorized modifications. To strengthen security, files are encrypted and fragmented before cloud storage, reducing the risk of data leakage. Identity-based authentication verifies users, while OTPbased verification ensures secure file sharing among authorized users. Performance evaluation shows that the system provides secure data access with minimal response time and effective access control features such as permission management and revocation. Experimental results indicate that the system successfully protects cloud data and ensures reliable sharing. The combination of multiple security mechanisms and efficient design makes it a practical solution for secure cloud environments.

Attar Misba Jamir, Alina Mohd Rafique Shaikh, Rutik Prakash Kalaskar, Sanchita Suresh Kharat,"Cloud Data security using SHA Algorithm & Identity Based Data Sharing On Cloud" International Journal of Scientific Research and Engineering Development, V9(2): Page(2146-2149) Mar-Apr 2026. ISSN: 2581-7175. www.ijsred.com. Published by Scientific and Academic Research Publishing.