题  目：分散式云网路上的秘密图像共享

内容简介：所谓的秘密图像共享是将秘密共享扩展到分享数字图像。(k, n)秘密图像共享是结合了密码学的秘密共享技术，和数字图像处理方法的重要研究领域。秘密图像被分享成n个子图像，并且可以从任何k个子图像恢复秘密图像。但是，不能从（k-1）或更少的子图像获得任何秘密信息。到现在为止，研究秘密图像共享的文献已有很多，研究者们提出了大量有特定功能的各种方案，可做多样性的应用。例如，具备认证功能、具备渐进式解密、具有意义的子影像、可共享多个秘密图像等秘密图像共享方案。还有，研究特殊规定的门槛组合，例如，(t, s, k, n)秘密图像共享与(t, k, n)秘密图像共享等。这个讲座讨论网路与秘密图像共享结合的问题。在此之前，所有(k, n)秘密图像共享方案并无法在分散式云网路(Distributed Cloud Network; DCN)，公开地回复秘密图像。为了在DCN上实现安全的秘密图像回复，所有参与回覆秘密图像的参与者之间需建立安全通信渠道。一个简单的安全通信渠道实现，是使用额外的密钥分分配协议为参与者提供一个公共密钥。本讲座引入了多变数对称姓多项式设计了DCN上的(k, n)秘密图像共享。它仍然具有门槛值特性（从任何k个子图像恢复秘密图像），同时提供在DCN上的安全秘密图像回复。这个方案可以非交互地共享密钥，让参与者之间建立安全通信渠道。

报告人：台湾国立东华大学  杨庆隆  教授

报告人简介：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 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.

时  间：2019年10月9日（周三）上午10：30始

地  点：南海楼338室

热烈欢迎广大师生参加!

信息科学技术学院

2019年9月30日