Specifications

transform and chaos
Authors: Sui, Liansheng1 ; Gao, Bo1/隋连升;高波
Author affiliation:
1 School of Computer Science and Engineering, Xi'An University of Technology, Xi'an 710048,
China
Corresponding author: Sui, L. ([e-mail])
Source title: Optics and Laser Technology
Abbreviated source title: Opt Laser Technol
Volume: 48
Issue date: 2013
Publication year: 2013
Pages: 117-127
Language: English
ISSN: 00303992
CODEN: OLTCAS
Document type: Journal article (JA)
Publisher: Elsevier Ltd, Langford Lane, Kidlington, Oxford, OX5 1GB, United Kingdom
Abstract: A single-channel color image encryption is proposed based on iterative fractional
Fourier transform and two-coupled logistic map. Firstly, a gray scale image is constituted with
three channels of the color image, and permuted by a sequence of chaotic pairs which is
generated by two-coupled logistic map. Firstly, the permutation image is decomposed into three
components again. Secondly, the first two components are encrypted into a single one based on
iterative fractional Fourier transform. Similarly, the interim image and third component are
encrypted into the final gray scale ciphertext with stationary white noise distribution, which has
camouflage property to some extent. In the process of encryption and description, chaotic
permutation makes the resulting image nonlinear and disorder both in spatial domain and
frequency domain, and the proposed iterative fractional Fourier transform algorithm has faster
convergent speed. Additionally, the encryption scheme enlarges the key space of the
cryptosystem. Simulation results and security analysis verify the feasibility and effectiveness of
this method. © 2012 Elsevier Ltd.
Number of references: 37
Main heading: Cryptography
Controlled terms: Fourier transforms - Image processing - Iterative methods -
White noise
Uncontrolled terms: Ciphertexts - Color image encryptions - Color images -
Convergent speed - Encryption schemes - Fractional Fourier transforms - Frequency
domains - Gray scale - Gray-scale images - Iterative fractional - Logistic maps -
Noise distribution - Security analysis - Single-channel - Spatial domains - Third
component - Three channel - Three component - Two-component
Classification code: 921.3 Mathematical Transformations - 741 Light, Optics and Optical
Devices - 723 Computer Software, Data Handling and Applications - 921.6 Numerical
Methods - 718 Telephone Systems and Related Technologies; Line Communications - 716
Telecommunication; Radar, Radio and Television - 711 Electromagnetic Waves - 717
Optical Communication