CONFIDENTIAL DEDUPLICATION WITH POLICY-BASED ACCESS CONTROL FOR MOBILE CLOUD STORAGE

Abstract

Mobile cloud storage provides scalable and accessible data management but faces challenges related to privacy, storage efficiency, and flexible access control. This project proposes a Confidential Deduplication with Policy-Based Access Control framework for secure mobile cloud environments. The system performs client-side encryption and hash-based deduplication to reduce redundant storage without exposing sensitive data or duplication patterns. Ciphertext-Policy AttributeBased Encryption (CP-ABE) enables fine-grained access control based on user attributes such as role, department, and clearance level. Stub ReEncryption supports rapid policy updates and user revocation without re-encrypting entire files. The implemented framework integrates MMLE, SHA256, CP-ABE, Redis, PostgreSQL, and mobile technologies. Testing demonstrated effective storage optimization, reduced data transmission, low computational overhead, strong security, scalability, and suitability for resource-constrained mobile cloud environments. Keywords: Mobile Cloud Storage, Data Deduplication, Policy-Based Access Control, CPABE, Stub Re-Encryption, Data Security.