This project implements an integrated image encryption system based on an Enhanced Elliptic Curve Integrated Encryption Scheme (E-ECIES). The system combines asymmetric Elliptic Curve Cryptography for secure key exchange with symmetric encryption algorithms for efficient image protection. The encryption process employs a three-phase approach: (1) Affine permutation for pixel position scrambling, (2) Elliptic curve pseudo-random sequence diffusion for pixel value alteration, and (3) Affine Power Affine (APA) S-box substitution for nonlinear confusion. The scheme utilizes SHA-256 for key derivation and incorporates timestamp-based authentication to prevent replay attacks. Implemented as a Django web application, the system provides user authentication, secure image sharing, and comprehensive audit logging. Experimental analysis demonstrates resistance to statistical, differential, and chosen-plaintext attacks while maintaining computational efficiency suitable for practical deployment.

Keywords:

Elliptic Curve Cryptography (ECC), Image Encryption, E-ECIES Protocol, Affine Power Affine (APA) S-box, Confusion-Diffusion Architecture, Secure Key Exchange, Digital Image Security, Multimedia Data Protection, SHA-256 Key Derivation, Django Web Application.