Colour image encryption scheme based on enhanced quadratic chaotic map. Issue 1 (1st January 2020)

• Record Type: Journal Article
• Authors: Herbadji, Djamel; Belmeguenai, Aissa; Derouiche, Nadir; Liu, Hongjung
• Is Part Of: IET image processing. Volume 14:Issue 1(2020)
• Page Start: 40
• Page End: 52
• Publication Date: 2020-01-01
• Subjects: statistical analysis -- cryptography -- image colour analysis -- chaos -- image processing -- chaotic communication; colour image encryption scheme -- enhanced quadratic chaotic map -- enhanced quadratic map -- EQM -- larger chaotic ranges -- classical quadratic map -- excellent confusion -- diffusion properties -- encryption structure -- plaintext image -- encrypted components -- USC‐SIPI image dataset -- real‐life image dataset -- image encryption schemes; Image processing -- Periodicals; 621.36705
• DOI: 10.1049/iet-ipr.2019.0123
• Languages: English
• ISSNs: 1751-9659

Abstract

Abstract : In this study, an enhanced quadratic map (EQM) is proposed and has been applied in a new colour image encryption scheme. The performance evaluations show that the EQM has excellent performances such as better Lyapunov exponent and larger chaotic ranges when compared with the classical quadratic map. The sequences generated from this EQM are successfully used in a new proposed colour image encryption scheme with excellent confusion and diffusion properties. The encryption structure is based on the permutation–diffusion process, and then adopted on the classical permutation, it is characterised by a high speed of diffusion, which enables the encryption of the three components of the plaintext image at the same time, and these encrypted components are simultaneously related to each other. The proposed scheme is tested on the USC‐SIPI image dataset and on the real‐life image dataset; its effectiveness is also compared with five latterly proposed image encryption schemes. The simulation results indicate that the proposed scheme has the properties of large key space, a weaker correlation between neighbouring pixels, higher sensitivity towards key, greater randomness of pixels and the capacity to withstand statistical analysis, plaintext/chosen‐plaintext attacks, and differential attacks, thus that it has higher security and can be appropriate for image encryption.