Mr. D. Pramod Kumar, D.Sheeja, P.Santhoshi, G.Sai, V.Anil 03 03 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 BlockchainBased Secure Photo Sharing System that ensures decentralized transparent and tamperproof 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 hashbased tamper detection enabling users to maintain full ownership and securely grant or revoke sharing rights Experimental results demonstrate 100 tamper detection subsecond access verification and elimination of singlepointoffailure vulnerabilities present in centralized systems Copyright (c) Journal of Science Engineering Technology and Management Science. All rights reserved 2026