Article
SECURE PHOTO SHARING ACROSS PLATFORMS USING BLOCKCHAIN TECHNOLOGY
Centralized photo sharing platforms such as social media and cloud storage services face critical challenges including data privacy violations, unauthorized access, content tampering, and loss of user ownership control. This paper proposes a Blockchain-Based Secure Photo Sharing System that ensures decentralized, transparent, and tamper-proof digital photo management. Photos are stored in the InterPlanetary File System (IPFS) for efficient decentralized storage, while cryptographic hashes, ownership records, and access permissions are stored on the Ethereum blockchain. Solidity smart contracts automate user authentication, access control, and permission management without reliance on third parties. The system guarantees data integrity through hash-based tamper detection, enabling users to maintain full ownership and securely grant or revoke sharing rights. Experimental results demonstrate 100% tamper detection, sub-second access verification, and elimination of single-point-offailure vulnerabilities present in centralized systems.
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