Abstract: The rapid proliferation of cloud-based services has transformed data storage, management, and sharing methods. Cloud computing offers significant advantages such as scalability, cost efficiency, and accessibility, making it a preferred choice for businesses and individuals. However, these benefits come with critical challenges, particularly in ensuring the security and accessibility of data stored in public cloud environments. As organizations increasingly rely on cloud services to manage their data, the need for robust data security mechanisms has become paramount.

The project introduces a novel approach to enhancing data security and accessibility in public cloud environments. It addresses the challenge of efficiently delegating decryption rights for subsets of encrypted data without requiring large decryption key sizes. The proposed system leverages a keyaggregate cryptosystem, termed DATA SHARING which integrates Triple DES (Data Encryption Standard) as the underlying encryption algorithm. The system aims to provide a comprehensive solution that combines robust encryption standards with efficient key management, ensuring data confidentiality and integrity while facilitating secure data sharing and access control.

| DOI: 10.17148/IARJSET.2024.11747