1. Cipher image damage and decisions in real time
- Author
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V. M. Silva-Garcia, Marlon David Gonzalez-Ramirez, Cesar Antonio Jiménez-Vázquez, R. Flores-Carapia, B. Luna-Benoso, and Carlos Rentería-Márquez
- Subjects
business.industry ,Color image ,Advanced Encryption Standard ,computer.file_format ,Encryption ,Pseudorandom permutation ,JPEG ,Atomic and Molecular Physics, and Optics ,Computer Science Applications ,Multiple encryption ,Permutation ,Cipher ,Computer Science::Multimedia ,Electrical and Electronic Engineering ,business ,computer ,Algorithm ,Computer Science::Cryptography and Security ,Mathematics - Abstract
This paper proposes a method for constructing permutations on m position arrangements. Our objective is to encrypt color images using advanced encryption standard (AES), using variable permutations means a different one for each 128-bit block in the first round after the x-or operation is applied. Furthermore, this research offers the possibility of knowing the original image when the encrypted figure suffered a failure from either an attack or not. This is achieved by permuting the original image pixel positions before being encrypted with AES variable permutations, which means building a pseudorandom permutation of 250,000 position arrays or more. To this end, an algorithm that defines a bijective function between the nonnegative integer and permutation sets is built. From this algorithm, the way to build permutations on the 0,1,…,m−1 array, knowing m−1 constants, is presented. The transcendental numbers are used to select these m−1 constants in a pseudorandom way. The quality of the proposed encryption according to the following criteria is evaluated: the correlation coefficient, the entropy, and the discrete Fourier transform. A goodness-of-fit test for each basic color image is proposed to measure the bits randomness degree of the encrypted figure. On the other hand, cipher images are obtained in a loss-less encryption way, i.e., no JPEG file formats are used.
- Published
- 2015
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