基于拉丁方的数字图像加密算法设计

Design of Digital Image Encryption Algorithm Based on Latin Square

摘要: 首先利用一个16阶拉丁方设计了一种基本密码系统，给出了它所决定非线性可逆变换和加解密变换的代数计算公式。然后，综合利用这种基本密码系统和现有的Logistic混沌系统，提出了一种新的流密码算法。最后，将这种流密码算法应用在图像加密中，并对加解密效果进行了仿真，仿真效果说明该算法具有良好的加解密效果。

Abstract: Firstly, a basic cryptosystem is designed by using a 16 order Latin square, and formulas of the non-linear reversible transformations of encryption and decryption are presented. Secondly, a new stream cipher algorithm is proposed by using this basic cryptosystem and the existing Logistic chaotic system. Finally, this stream cipher algorithm is applied to encrypt digit image, and the im-age encryption and decryption are simulated. The simulation shows that this algorithm has good encryption and decryption effect.