On the Security Analysis of a Hopfield Chaotic Neural Network-Based Image Encryption Algorithm

Figure 5

The breaking results on CIEA-HCNN with RGB color Lena, Baboon, and Pepper. (a) Lena ciphertext image. (b) Recovered permutation image of Lena. (c) Recovered plaintext image of Lena. (d) Difference image of Lena. (e) Baboon ciphertext image. (f) Recovered permutation image of Baboon. (g) Recovered plaintext image of Baboon. (h) Difference image of Baboon. (i) Pepper ciphertext image. (j) Recovered permutation image of Pepper. (k) Recovered plaintext image of Pepper. (l) Difference image of Pepper.

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