Blockchain-Based Decentralized Cloud Storage with Privacy-Preserving Access Control using IPFS and ECC
DOI:
https://doi.org/10.15662/IJEETR.2026.0802436Keywords:
Blockchain, Cloud Security, Data Privacy, Decentralized Storage, Elliptic Curve Cryptography, IPFS, Zero-Knowledge ProofAbstract
Cloud storage has become essential for modern data management, yet centralized architectures introduce critical security and privacy concerns such as data breaches, unauthorized access, and reliance on third-party providers. Centralized systems store sensitive information in a single location, increasing vulnerability and limiting user control over data. To overcome these limitations, this paper presents a decentralized framework for secure and privacy-preserving data storage and sharing. The proposed approach integrates blockchain technology, InterPlanetary File System (IPFS), and advanced cryptographic techniques to ensure data confidentiality, integrity, and transparency. Files are securely encrypted and stored in a distributed manner using IPFS, while blockchain maintains immutable records of access control and transactions. Cryptographic mechanisms, including proxy re-encryption and zero-knowledge proofs, enable secure data sharing and user authentication without exposing sensitive information. This architecture eliminates single points of failure and reduces dependency on centralized authorities. The framework enhances user control over data while ensuring secure access and efficient management. Overall, the proposed solution provides a scalable and trustworthy environment for cloud data storage, addressing key challenges in security, privacy, and transparency in modern digital systems.
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