Plaintext-Related Dynamic Key Chaotic Image Encryption Algorithm
To address the problems of the high complexity and low security of the existing image encryption algorithms, this paper proposes a dynamic key chaotic image encryption algorithm with low complexity and high security associated with plaintext. Firstly, the RGB components of the color image are read,...
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2021-09-01
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doaj-98f2fbbb4f34475e93ec7819a1cc258e2021-09-26T00:06:50ZengMDPI AGEntropy1099-43002021-09-01231159115910.3390/e23091159Plaintext-Related Dynamic Key Chaotic Image Encryption AlgorithmZeming Wu0Ping Pan1Chunyang Sun2Bing Zhao3Electronic Engineering College, Heilongjiang University, Harbin 150080, ChinaElectronic Engineering College, Heilongjiang University, Harbin 150080, ChinaElectronic Engineering College, Heilongjiang University, Harbin 150080, ChinaElectronic Engineering College, Heilongjiang University, Harbin 150080, ChinaTo address the problems of the high complexity and low security of the existing image encryption algorithms, this paper proposes a dynamic key chaotic image encryption algorithm with low complexity and high security associated with plaintext. Firstly, the RGB components of the color image are read, and the RGB components are normalized to obtain the key that is closely related to the plaintext, and then the Arnold transform is used to stretch and fold the RGB components of the color image to change the position of the pixel points in space, so as to destroy the correlation between the adjacent pixel points of the image. Next, the generated sequences are independently encrypted with the Arnold-transformed RGB matrix. Finally, the three encrypted images are combined to obtain the final encrypted image. Since the key acquisition of this encryption algorithm is related to the plaintext, it is possible to achieve one key per image, so the key acquisition is dynamic. This encryption algorithm introduces chaotic mapping, so that the key space size is <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msup><mrow><mn>10</mn></mrow><mrow><mn>180</mn></mrow></msup></mrow></semantics></math></inline-formula>. The key acquisition is closely related to the plaintext, which makes the ciphertext more random and resistant to differential attacks, and ensures that the ciphertext is more secure after encryption. The experiments show that the algorithm can encrypt the image effectively and can resist attack on the encrypted image.https://www.mdpi.com/1099-4300/23/9/1159image encryptionplaintext-relateddynamic keyschaotic systems |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Zeming Wu Ping Pan Chunyang Sun Bing Zhao |
spellingShingle |
Zeming Wu Ping Pan Chunyang Sun Bing Zhao Plaintext-Related Dynamic Key Chaotic Image Encryption Algorithm Entropy image encryption plaintext-related dynamic keys chaotic systems |
author_facet |
Zeming Wu Ping Pan Chunyang Sun Bing Zhao |
author_sort |
Zeming Wu |
title |
Plaintext-Related Dynamic Key Chaotic Image Encryption Algorithm |
title_short |
Plaintext-Related Dynamic Key Chaotic Image Encryption Algorithm |
title_full |
Plaintext-Related Dynamic Key Chaotic Image Encryption Algorithm |
title_fullStr |
Plaintext-Related Dynamic Key Chaotic Image Encryption Algorithm |
title_full_unstemmed |
Plaintext-Related Dynamic Key Chaotic Image Encryption Algorithm |
title_sort |
plaintext-related dynamic key chaotic image encryption algorithm |
publisher |
MDPI AG |
series |
Entropy |
issn |
1099-4300 |
publishDate |
2021-09-01 |
description |
To address the problems of the high complexity and low security of the existing image encryption algorithms, this paper proposes a dynamic key chaotic image encryption algorithm with low complexity and high security associated with plaintext. Firstly, the RGB components of the color image are read, and the RGB components are normalized to obtain the key that is closely related to the plaintext, and then the Arnold transform is used to stretch and fold the RGB components of the color image to change the position of the pixel points in space, so as to destroy the correlation between the adjacent pixel points of the image. Next, the generated sequences are independently encrypted with the Arnold-transformed RGB matrix. Finally, the three encrypted images are combined to obtain the final encrypted image. Since the key acquisition of this encryption algorithm is related to the plaintext, it is possible to achieve one key per image, so the key acquisition is dynamic. This encryption algorithm introduces chaotic mapping, so that the key space size is <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msup><mrow><mn>10</mn></mrow><mrow><mn>180</mn></mrow></msup></mrow></semantics></math></inline-formula>. The key acquisition is closely related to the plaintext, which makes the ciphertext more random and resistant to differential attacks, and ensures that the ciphertext is more secure after encryption. The experiments show that the algorithm can encrypt the image effectively and can resist attack on the encrypted image. |
topic |
image encryption plaintext-related dynamic keys chaotic systems |
url |
https://www.mdpi.com/1099-4300/23/9/1159 |
work_keys_str_mv |
AT zemingwu plaintextrelateddynamickeychaoticimageencryptionalgorithm AT pingpan plaintextrelateddynamickeychaoticimageencryptionalgorithm AT chunyangsun plaintextrelateddynamickeychaoticimageencryptionalgorithm AT bingzhao plaintextrelateddynamickeychaoticimageencryptionalgorithm |
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1717367048033533952 |