Nonlinear Dynamics

, Volume 67, Issue 1, pp 557–566 | Cite as

A new image encryption method: parallel sub-image encryption with hyper chaos

  • Omid Mirzaei
  • Mahdi Yaghoobi
  • Hassan Irani
Original Paper


A new image encryption scheme, based on a total shuffling and parallel encryption algorithm is proposed in this paper. Two chaotic systems have been used in the encryption algorithm to confuse the relationship between the plain-image and the cipher-image. To make the encryption procedure more confusing and complex, the plain-image is first divided into 4 sub-images and then the position of each sub-image is changed pseudo-randomly according to a logistic map. Next, a total shuffling matrix is used to shuffle the position of pixels in the whole image and then sub-images are encrypted simultaneously in a parallel manner. The experimental results on USC data base demonstrate that the proposed encryption algorithm has a low time complexity and has the advantages of large key space and high security. Moreover, the robustness of this locally encryption method is much more in contrast with other encryption schemes and the distribution of gray values has a random-like behavior in the encrypted image.


Parallel image encryption Hyper chaos Image shuffling Image division 


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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  1. 1.Engineering Department, Artificial Intelligence GroupIslamic Azad UniversityMashhad BranchIran

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