paper

Deciphering a novel image cipher based on mixed transformed Logistic maps

arXiv:1404.3600 · doi:10.1142/S0218127415501886

Abstract

Since John von Neumann suggested utilizing Logistic map as a random number generator in 1947, a great number of encryption schemes based on Logistic map and/or its variants have been proposed. This paper re-evaluates the security of an image cipher based on transformed logistic maps and proves that the image cipher can be deciphered efficiently under two different conditions: 1) two pairs of known plain-images and the corresponding cipher-images with computational complexity of ; 2) two pairs of chosen plain-images and the corresponding cipher-images with computational complexity of , where is the number of pixels in the plain-image. In contrast, the required condition in the previous deciphering method is eighty-seven pairs of chosen plain-images and the corresponding cipher-images with computational complexity of . In addition, three other security flaws existing in most Logistic-map-based ciphers are also reported.

10 pages, 2 figures

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