JPEG Image Encryption Algorithm Based on Hyperchaotic, Mixed Hash and Dynamic DNA

Qiu-Yu Zhang ； Yu-Tong Ye

《International Journal of Network Security》 24卷2期 (2022/03) Pp. 216-229

https://doi.org/10.6633/IJNS.202203_24(2).04

摘要

This paper proposes a new JPEG image encryption algorithm based on hyperchaotic, mixed hash, and dynamic DNA to solve the problem of poor robustness and low efficiency in existing JPEG image encryption schemes. First, the plaintext image is converted into a DNA matrix through DNA coding rules and permutated by the encryption key, generated by the chaotic system and a mixed hash function (MD5 and SHA-256). Secondly, the encryption key is used to dynamically control the DNA operation for diffusion. Finally, the ciphertext image is obtained by decoding the DNA codec rules. Experiments show that the proposed Algorithm is efficiently resistant to statistical attacks and has efficient encryption. Furthermore, the critical space can reach 2507, the critical sensitivity is high, the pixel correlation coefficient is close to 0, the information entropy is close to 8, the UACI and NPCR values are close to the ideal value, and it has good robustness against noise, cropping and JPEG compression attacks.

關鍵字

Dynamic DNA Coding ； Image Encryption ； JPEG Image ； Mixed Hash ； 5D Lorenz Hyperchaotic System