关键词: Henon超混沌系统, BP神经网络, AES加密算法, 图像加密

Abstract: Aiming at the disadvantages of AES（Advanced Encryption Standard） encryption algorithm in the field of image encryption, an image encryption algorithm based on improved Henon hyperchaotic system combined with AES algorithm is proposed. Firstly, the algorithm uses the four-dimensional Henon hyperchaotic system to produce hyperchaotic sequences. By introducing the average value of the pixels of the plaintext image as the parameters to intercept the hyperchaotic sequence as the training sample of the BP neural network, and the nonlinear chaotic sequence obtained after the training is used as the goal key of the AES. Then, the target key is substituted into the AES encryption algorithm for two cycles of encryption to get the ciphertext. During each cycle of encryption, and the new S-boxes and round keys are generated from the chaotic sequence, greatly increasing the randomness of the key. The simulation results show that the proposed algorithm can well combine the advantages of the algorithms, which can achieve good encryption effect.

Key words: Henon hyperchaotic system, BP neural network, AES encryption algorithm, image encryption