An Image Encryption Method Based on the Feistel Network and Dynamic DNA Encoding

作者：Zhang, Xuncai^*; Zhou, Zheng; Niu, Ying

来源：IEEE Photonics Journal, 2018, 10(4): 3901014.

DOI：10.1109/JPHOT.2018.2859257

• Image encryption
• Feistel network
• dynamic DNA encoding
• Hill matrix
• chaotic sequence

Based on the Feistel network and dynamic deoxyribonucleic acid (DNA) encoding technology, an image encryption method is proposed using the "permutation-diffusion-scrambling" structure. First, the SHA-3 algorithm is used to calculate the hash value of the plaintext image as the initial value of the hyperchaotic system, and the chaos-generated sequence is used to generate the Hill cipher matrix to replace the image pixel. Second, the DNA sequence operation is used as the F function of the Feistel network. The DNA sequence database is used as the key K of Feistel network, and the image pixel value diffusion is realized by the Feistel network. Finally, further diffusion is carried out through the ciphertext feedback and through the ciphertext confusion and diffusion of three rounds of "chaotic scrambling-DNA encoding-Feistel transformation-DNA decoding," making the ciphertext more random and resistant to attacks and ensuring that the encrypted ciphertext is more secure. The experimental results show that the proposed method can effectively encrypt the image and has prominent characteristics, such as strong plaintext sensitivity, a large key space, and excellent ciphertext statistical properties.

• 出版日期2018-8
• 单位郑州轻工业大学