Authors - Asritha Paruchuri, Gudivada Krishna Prakash, Mulla Junaid Rahman, Lambu Damarukanath, Guttikonda Prashanti Abstract - The sharing of images in decentralized settings needs high assurances of secrecy, integrity and controlled access. The fast development of cloud-based services and online communication tools have multiplied the communication of sensitive images, and the traditional centralized storage and single-layer security systems are susceptible to cyber-attacks, unauthorized access, and data leakage. The presented paper outlines a safe and decentralized image-sharing system based on Advanced Encryption Standard (AES), the Secret Sharing scheme by Shamir, blockchain authentication, and decentralized storage with the Interplanetary File System (IPFS). First, the input image is encrypted with the help of AES to provide high cryptographic confidentiality. The ciphertext image is further split into shares with secret sharing scheme that avoids unauthorized disclosure and only allows the reconstruction of the encrypted image when the necessary number of valid shares is received. The encrypted shares that are generated are stored in a decentralized way using IPFS, which is highly available, fault tolerant, and does not have a single point of failure. Decentralized access control, participant authentication and integrity verification that is tamper-resistant are enforced using blockchain technology. In the reconstruction process, the encrypted image is reconstructed with the help of Lagrange interpolation and then decrypted with the help of AES, which guarantees safe and lossless recovery of the original im-age. The suggested framework offers multi-layer security, increases confidentiality and data integrity, removes centralized vulnerabilities, and is highly resistant to unauthorized access and data-alteration.
Open Zoom