Breaking an Image Encryption Algorithm Based on DNA Encoding and Spatiotemporal Chaos
AbstractRecently, an image encryption algorithm based on DNA encoding and spatiotemporal chaos (IEA-DESC) was proposed. In IEA-DESC, pixel diffusion, DNA encoding, DNA-base permutation and DNA decoding are performed successively to generate cipher-images from the plain-images. Some security analyses and simulation results are given to prove that it can withstand various common attacks. However, in this paper, it is found that IEA-DESC has some inherent security defects as follows: (1) the pixel diffusion is invalid for attackers from the perspective of cryptanalysis; (2) the combination of DNA encoding and DNA decoding is equivalent to bitwise complement; (3) the DNA-base permutation is actually a fixed position shuffling operation for quaternary elements, which has been proved to be insecure. In summary, IEA-DESC is essentially a combination of a fixed DNA-base position permutation and bitwise complement. Therefore, IEA-DESC can be equivalently represented as simplified form, and its security solely depends on the equivalent secret key. So the equivalent secret key of IEA-DESC can be recovered using chosen-plaintext attack and chosen-ciphertext attack, respectively. Theoretical analysis and experimental results show that the two attack methods are both effective and efficient. View Full-Text
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Wen, H.; Yu, S.; Lü, J. Breaking an Image Encryption Algorithm Based on DNA Encoding and Spatiotemporal Chaos. Entropy 2019, 21, 246.
Wen H, Yu S, Lü J. Breaking an Image Encryption Algorithm Based on DNA Encoding and Spatiotemporal Chaos. Entropy. 2019; 21(3):246.Chicago/Turabian Style
Wen, Heping; Yu, Simin; Lü, Jinhu. 2019. "Breaking an Image Encryption Algorithm Based on DNA Encoding and Spatiotemporal Chaos." Entropy 21, no. 3: 246.
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