基于异或的外形比例不失真(k,n)视觉密码方案

ASPECT RATIO INVARIANT(K,N)VISUAL CRYPTOGRAPHY SCHEME BASED ON XOR

通过设计基于奇偶列的加密矩阵构造方法,结合多行扫描和多点加密的像素不扩展技术,提出一种基于“异或”运算的(k,n)视觉密码方案,并证明方案的安全性和有效性。实验结果表明,该方案能够实现秘密图像的外形比例不失真恢复,同时提高相对差,有效改善图像的恢复效果。

By designing the construction method for encryption matrix based on odd-even columns,and combining the pixel unexpanded technology with multi-lines scanning and multi-pixel encryption,this paper proposes a(k,n)visual cryptography scheme based on"XOR"operation.Meanwhile,the security and effectiveness of our scheme is proved.The experimental results indicate that our scheme can achieve the undistorted restoration of the aspect ratio of the secret image.The relative difference is increased,and the restoration effect of the image is effectively improved.