Security analysis of an image encryption algorithm based on a DNA addition combining with chaotic maps |
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Authors: | Houcemeddine Hermassi Akram Belazi Rhouma Rhouma Safya Mdimegh Belghith |
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Affiliation: | 1. SysCom Laboratory, école Nationale d’Ingénieurs de Tunis (ENIT), Le Belvedere, Tunisia
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Abstract: | In this paper, we propose to cryptanalyse an encryption algorithm which combines a DNA addition and a chaotic map to encrypt a gray scale image. Our contribution consists on, at first, demonstrating that the algorithm, as it is described, is non-invertible, which means that the receiver cannot decrypt the ciphered image even if he posses the secret key. Then, a chosen plaintext attack on the invertible encryption block is described, where, the attacker can illegally decrypt the ciphered image by a temporary access to the encryption machinery. |
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