IDENTITY-BASED ENCRYPTION TRANSFORMATION FOR FLEXIBLE SHARING OF ENCRYPTED DATA IN PUBLIC CLOUD.

Abstract

In modern cloud computing environments, data sharing and security have become crucial challenges, particularly when sensitive information is stored on public cloud servers. Traditional encryption methods require complex key management and lack flexibility in user access control. To address these issues, this paper presents an Identity-Based Encryption (IBE) Transformation for Flexible Sharing of Encrypted Data in Public Cloud. The proposed system leverages the concept of IBE, where a user’s unique identity (such as an email ID) serves as the public key, simplifying key distribution and authentication processes. By introducing a proxy-based transformation mechanism, encrypted data can be securely shared with authorized users without decrypting it on the cloud server. This approach ensures data confidentiality, fine-grained access control, and reduced computational overhead on the data owner. The transformation also supports dynamic user revocation and re-encryption, making it highly adaptable for real-world cloud storage and data-sharing scenarios