多秘密队列共享的安全视觉密码

Security Multi-secret Visual Cryptography Based on Queue Sharing

针对现有多秘密视觉密码方案中存在的角度旋转问题和视觉质量问题,提出一种(2,N-1,N)多秘密视觉密码方案.方案通过研究共享图像之间的关系和多级对比度的恢复特性,在加密过程中采用多级对比度的编码方法,提高了恢复密图的视觉质量;同时利用相邻共享图像关系在N幅共享图像中对N-1幅密图进行加密,提高了方案的加密能力.并且给出了方案安全性和加密量的分析证明.最后给出了(2,3,4)实验方案,实验结果表明了方案的高视觉质量和多秘密特性,验证了方案的可行性.

Aiming at the problems of rotation angle and visual quality in the existing multi-secret visual cryptography schemes,A type of multi-secret visual cryptography schemes（2,N-1,N）-QVCS is designed according to the sharing images＇ relationship and multistage contrast.The proposed scheme significantly improve the quality of the reconstructed secret image by multistage contrast encoding method;and encode N-1 secret images in N sharing images by the adjacency relationship of participants.And the analysis of security and encryption capacity is given.At last,an experiment on（2,3,4）-QVCS is presented.Experiment result shows its high visual quality and multi-secret,and demonstrate the effectiveness of our scheme.