A fractal‐based image encryption system. Issue 12 (1st December 2014)

• Record Type: Journal Article
• Authors: Abd‐El‐Hafiz, Salwa Kamal; Radwan, Ahmed G.; Abdel Haleem, Sherif H.; Barakat, Mohamed L.
• Is Part Of: IET image processing. Volume 8:Issue 12(2014)
• Page Start: 742
• Page End: 752
• Publication Date: 2014-12-01
• Subjects: fractals -- cryptography -- image processing; fractal based image encryption system -- confusion process -- diffusion process -- image information -- simplified encryption technique -- statistical analysis -- general encryption system -- feedback delay -- independent horizontal -- vertical shifts -- encryption quality -- correlation coefficients -- histogram distributions -- differential attack measurement -- key sensitivity analysis -- NIST statistical; Image processing -- Periodicals; 621.36705
• DOI: 10.1049/iet-ipr.2013.0570
• Languages: English
• ISSNs: 1751-9659

Abstract

Abstract : This study introduces a novel image encryption system based on diffusion and confusion processes in which the image information is hidden inside the complex details of fractal images. A simplified encryption technique is, first, presented using a single‐fractal image and statistical analysis is performed. A general encryption system utilising multiple fractal images is, then, introduced to improve the performance and increase the encryption key up to hundreds of bits. This improvement is achieved through several parameters: feedback delay, multiplexing and independent horizontal or vertical shifts. The effect of each parameter is studied separately and, then, they are combined to illustrate their influence on the encryption quality. The encryption quality is evaluated using different analysis techniques such as correlation coefficients, differential attack measures, histogram distributions, key sensitivity analysis and the National Institute of Standards and Technology (NIST) statistical test suite. The obtained results show great potential compared to other techniques.