A novel encryption method of color image combining Hadamard transform with logical modulation
Qi Liu, Qiong‐Hua Wang, Ying Wang, Jun Wang · 2016
In this paper, a novel encryption and decryption method for color images based on the Hadamard transform (HT) and logical modulation has been proposed. Firstly, considering security and efficiency, together, our cryptosystem combined with image compression can reduce encryption time and promote real-time secure image transmission and storage. Then the compressed image is encrypted by logical modulation with chaotic sequence in HT domain. Furthermore, the validity and feasibility of proposed method is demonstrated by experimental simulation results in the case of ensuring good quality of recovered image.