Image data security using Quasigroup combined with Fibonacci Q-transformation

Abstract

This paper proposes an image encryption scheme using Quasigroup and Fibonacci Q-transformation. The proposed scheme is based on substitution–permutation structure, which can handle the images of any size, i.e., square as well as non-square. The Quasigroup of order 256 and Fibonacci Q-transformation are used as primitives for substitution and diffusion of image pixels, respectively. The encryption method is designed to have the secret keys applied with specific orders such that correct decryption is only possible when correct keys and correct orders are supplied together. The proposed scheme has good efficiency, an extensively huge key space and ability to resist all common attacks. The feasibility and performance of the proposed scheme is examined by conducting various experimental results. The robustness of the proposed scheme is validated by analyzing it against statistical and cryptanalytical attacks. Further, superiority of the proposed scheme is confirmed by comparing with the related works.