Efficient image encryption scheme with synchronous substitution and diffusion based on double S-boxes

• 来源期刊: 中国物理B（英文版）
• 关键词: image encryption S-box crack synchronous substitution and diffusion
• 年，卷（期）: 2018,（8）
• 页码范围: 180-188
• 页数: 9页
• 语种: 英文
• DOI: 10.1088/1674-1056/27/8/080701

摘要

Single or multiple S-boxes are widely used in image encryption schemes, and in many image encryption schemes the asynchronous encryption structure is utilized, which separates the processes of substitution and diffusion. In this paper, we analyze the defects of this structure based on the example of an article and crack it using a simpler method. To address the defects of the asynchronous encryption structure, a novel encryption scheme is proposed, in which the structure of synchronous substitution and diffusion based on double S-boxes is utilized, so the processes of substitution and diffusion are combined together and the attackers cannot crack the cryptosystem by any of the processes. The simulation results and security analysis show that the proposed encryption scheme is safer and more efficient to expediently use in the real-time system.