活动类别：密码学学术报告

报告题目：基于多项式与基于矩阵编码的秘密图像共享的关系及其优缺点

报告时间：14:30-17:30

报告日期：2019-11-25，星期一

地点：长安校区 文津楼三段5层3524

主办单位：bevitor伟德官网 网络安全研究团队

报告人：台湾东华大学教授 杨庆龙

讲座内容简介：

    秘密图像共享（Secret Image Sharing；SIS）是结合了密码学的秘密共享技术（Secret Sharing；SS），和数字图像处理方法的重要研究领域。然而，SIS不仅仅是SS和图像处理的简单组合。在将SS扩展到SIS时，应仔细解决一些关键问题（例如，秘密类型、有限域选择、嵌入位置等）。(k，n) SIS是将秘密图像共享到n个子秘密图像中，并且可以从任何k个秘密图像中恢复秘密图像。然而，人们无法从（k-1）或更少的阴影图像获得任何秘密信息。在本报告中，介绍了实现(k，n) SIS的两种主要方法。第一个是基于多项式的SIS，它基于众所周知的Shamir的秘密共享。而另一个是基于矩阵编码的SIS;例如，使用Reed Solomon纠错码，最大距离分离码。讨论了基于多项式的SIS与基于矩阵编码的SIS的关系。事实上，基于多项式的SIS和基于矩阵编码的SIS之间存在很高的相似性和紧密关系。这两个方法只是以不同方式看同一个问题。因此，可以分别使用这两种方法来研究相同的研究问题，并且仍然有贡献。这两种方法各有其优点和缺点，可以适当地结合起来凸显其长处，同时避免其缺点。本报告让您更深入地了解基于多项式的SIS和基于矩阵编码的SIS的各自特征，以设计和开发SIS。此外，也也会介绍SIS的最新技术、算法、解决方案、和应用。

讲座人简介

Professor Ching-Nung Yang obtained his Ph. D. degree in Electrical Engineering from National Cheng Kung University. His B.S. and M.S. degrees, both were awarded in Department of Telecommunication Engineering from National Chiao Tung University. Dr. Yang served in National Dong Hwa University since 1999. His current title is Professor in Department of Computer Science and Information Engineering. He had been Visiting Professor to University of Missouri Kansas City, University of Milan, and University of Tokyo. He is currently a Fellow of IET (IEE) and an IEEE senior member. Professor Yang has done extensive researches on visual cryptography and secret image sharing, and is the chief scientist in both areas. In fact, a very important innovation of visual cryptography, the probabilistic visual cryptography, was firstly proposed by Professor Yang. His areas of interest include error correcting code, multimedia security, cryptography, and information security. He has authored two books and has published over 250 (including more than 120 SCI-indexed journal papers) professional research papers in the areas of information security and coding theory. In the meantime, he has served/is serving in international academic organizations. He serves as technical reviewers for over 40 major scientific journals in the areas of his expertise, and serves as editorial boards and editors of special issues for some journals. Also, he was invited as chairs, keynote speakers, and members of program committees for various international conferences. He is the recipient of the 2000, 2006, 2010, 2012, and 2014 Fine Advising Award in the Thesis of Master/PhD of Science awarded by Institute of Information & Computer Machinery.