讲座题目：基于魔术矩阵的隐写技术

讲座人：张真诚 教授

讲座人简介：张真诚教授，台湾交通大学计算机工程博士，IEEE&IEE会士，现任逢甲大学教授，台湾中正大学荣誉教授、合聘教授，台湾清华大学合聘教授。张教授曾发表信息科学论文1000余篇，其中SCI检索文章600余篇，专著10册，对于数据库设计、电子多媒体影像技术、密码学、电子商务安全等领域有卓越的研究贡献。

讲座内容简介：

Steganography is the science of secret message delivery using cover media. A digital image is a flexible medium used to carry a secret message because the slight modification of a cover image is hard to distinguish by human eyes.

In this speech, the speaker will introduce three methods: Kim et al.'s method, Zhang and Wang’s method and Sudoku solutions. A selected Sudoku solution is used to guide cover pixels’ modification in order to imply secret data. Because the number of possible Sudoku solutions is very large, the proposed method is more secure than Kim et al.'s  method and Zhang andWang’s method. From the experimental results, the visual quality of stego images produced by the Sudoku method is higher than 44 dB in average, which is slightly less than that of related works;however, the embedding capacity of the proposed method is 1.5 bit perpixel, which is greater than that of the related works.

讲座时间：2015年7月7日10:00

讲座地点：信息科学与工程学院C1-2楼会议室

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