The Security Defect of a Multi-pixel Encoding Method

摘要：

　　A visual cryptography scheme (VCS) encodes a secret image into several share images, such that stacking sufficient number of shares will reveal the secret while insufficient number of shares provide no information about the secret.The beauty of VCS is that the secret can be decoded by human eyes without needing any cryptography knowledge nor any computation.Variance is first introduced by Hou et al.in 2005 to evaluate the visual quality of size invariant VCS.Liu et al.in 2012 thoroughly verified this idea and significantly improved the visual quality of previous size invariant VCSs.In this paper, we first point out the security defect of Hou et al.”s multi-pixel encoding method (MPEM) that if the secret image has simple contours, each single share will reveal the content of that secret image.Then we use variance to explain the above security defect.

关键词： Visual cryptography Variance Security defect

作者: Teng Guo Feng Liu ChuanKun Wu YoungChang Hou YaWei Ren Wen Wang

作者单位: State Key Laboratory of Information Security,Institute of Information Engineering,Chinese Academy of State Key Laboratory of Information Security,Institute of Information Engineering,Chinese Academy of Department of Information Management,Tamkang University Taipei County 251,Taiwan State Key Laboratory of Information Security,Institute of Information Engineering,Chinese Academy of

会议类型: 国内会议

会议名称: 第十一全国博士生学术年会——信息技术与安全专题

会议地点: 成都

会议语种:英文

页码: 235-243

在线出版日期: 2013-10-01（万方平台首次上网日期，不代表论文的发表时间）