Authors: Omid Mirzaei Mahdi Yaghoobi Hassan Irani
Publish Date: 2011/03/17
Volume: 67, Issue: 1, Pages: 557-566
Abstract
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 plainimage and the cipherimage To make the encryption procedure more confusing and complex the plainimage is first divided into 4 subimages and then the position of each subimage is changed pseudorandomly according to a logistic map Next a total shuffling matrix is used to shuffle the position of pixels in the whole image and then subimages 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 randomlike behavior in the encrypted image
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