4.7 Article

Color image encryption based on one-time keys and robust chaotic maps

Journal

COMPUTERS & MATHEMATICS WITH APPLICATIONS
Volume 59, Issue 10, Pages 3320-3327

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.camwa.2010.03.017

Keywords

Robust Chaotic map; Color image encryption; One-time keys; Perturbation; Pseudo-random sequence; Key stream

Funding

  1. National Natural Science Foundation of China [60973152, 60573172]
  2. Superior University doctor subject special scientific research foundation of China [20070141014]
  3. National Natural Science Foundation of Liaoning province [20082165]
  4. China Visiting Scholars Program for Outstanding young college teachers in Shandong Province

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We designed a stream-cipher algorithm based on one-time keys and robust chaotic maps, in order to get high security and improve the dynamical degradation. We utilized the piecewise linear chaotic map as the generator of a pseudo-random key stream sequence. The initial conditions were generated by the true random number generators, the MD5 of the mouse positions. We applied the algorithm to encrypt the color image, and got the satisfactory level security by two measures: NPCR and UACI. When the collision of MD5 had been found, we combined the algorithm with the traditional cycle encryption to ensure higher security. The ciphered image is robust against noise, and makes known attack unfeasible. It is suitable for application in color image encryption. Crown Copyright (C) 2010 Published by Elsevier Ltd. All rights reserved.

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