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基于拉丁方的混沌图像加密算法设计
Design of a Chaotic Image Encryption Algorithm Based on Latin Squares

DOI: 10.12677/CSA.2023.131015, PP. 143-153

Keywords: 流密码算法,基本密码系统,拉丁方,时变离散时空混沌系统
Stream Cipher Algorithm
, Basic Cryptosystem, Latin Square, Time-Varying Discrete Spatiotemporal Chaotic System

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Abstract:

本文研究了一类二维时变离散时空系统的混沌性,并分析了它的多种伪随机性能。在此基础上,结合拉丁方构造的基本密码系统,设计了一种新的多元流密码算法。将该算法应用于数字图像加密之中,并与二元流密码系统的加密效果进行了对比。实验结果表明新算法具有足够大的密钥空间,并具有良好的加密性能和安全性。
This paper studies the chaos of a class of two-dimensional time-varying discrete spatiotemporal systems and analyzes its several pseudorandom properties. On this basis, combined with a basic cipher system constructed by a Latin square, a new multi-bit stream cipher algorithm is designed out and is applied in digital image encryption. Compared with the encryption effect of the single-bit stream cipher algorithm, simulations show that the new algorithm has a large enough key space, good encryption performance and security.

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