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@article{192450,
        author = {Surya R and Dr Neethi M V and Sahana N and Aishwarya R and Thejas Gowda G R},
        title = {Blockchain Based File Sharing System},
        journal = {International Journal of Innovative Research in Technology},
        year = {2026},
        volume = {12},
        number = {9},
        pages = {1887-1893},
        issn = {2349-6002},
        url = {https://ijirt.org/article?manuscript=192450},
        abstract = {Cloud storage platforms like Google Drive and Dropbox are commonly used for data sharing today. However, their centralized structure presents issues like single points of failure, security problems, and lack of transparency. This document introduces BlockNest, a cloud file sharing system based on blockchain technology that ensures secure, transparent, and decentralized data management. The immutable and distributed ledger of blockchain provides a tamper-resistant record of file uploads, downloads, and access rights. This setup makes all actions verifiable and reliable.
The system uses AES-256 encryption methods to keep data confidential. Smart contracts manage access control by automatically granting or retracting permissions without relying on a central authority. Actual files are stored off-chain in cloud or decentralized storage systems like IPFS. Only file hashes and metadata are recorded on the blockchain to minimize storage needs. Users can securely upload files, share them with authorized users, and verify file authenticity through blockchain-based checks.
Experimental findings show that AES-256 encryption achieves a 98.7% file integrity validation rate. Blockchain transaction latency is below 2.3 seconds for 85% of transactions. The proposed system improves data privacy, prevents unauthorized access, and offers a strong solution for secure file sharing in education, business, healthcare.},
        keywords = {Blockchain, Cloud Storage, File Exchange, Smart Contracts, IPFS, Distributed storage Access Management, Data Protection, Cryptocurrency.},
        month = {February},
        }