Computer Science ›› 2018, Vol. 45 ›› Issue (4): 178-181, 189.doi: 10.11896/j.issn.1002-137X.2018.04.030

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Chosen Plaintext Attack on Chaotic Image Encryption Algorithm Based on Perceptron Model

ZHU Shu-qin, WANG Wen-hong and LI Jun-qing   

  • Online:2018-04-15 Published:2018-05-11

Abstract: This paper analyzed the security of a chaotic image encryption algorithm based on preceptron model and found that the essence of the algorithm is to change the value of bits of the plaintext image according to the equivalent key stream to get the cipher image.However,there is no relation between the equivalent key stream and the plain text image or the corresponding cipher text image.By applying chosen plaintext attacks,this paper found that the equivalent key can be cracked,which can be further exploited to decrypt the target plain image.In addition,two other security defects were also reported.Finally,the original algorithm was improved to overcome the shortcomings of the original algorithm.Both mathematical analysis and experimental results show that the feasibility of the proposed chosen plaintext attack strategies and the effectiveness of the improved algorithm are verified.

Key words: Chaotic image encryption,Cryptanalysis,Equivalent key,Chosen plaintext attack

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