报告题目【Authenticatable Visual Secret Sharing】
时间：2019年3月19日 (星期二) 下午14:30
地点：旗山校区理工北楼601报告厅
主讲：台湾逢甲大学教授，张真诚
主办：数学与信息学院
参加对象：计算机与信息安全教师与研究生
专家简介：张真诚博士现任逢甲大学讲座教授，中正大学荣誉教授与“清华”大学合聘教授。他对于信息安全、密码学与多媒体图像处理三大领域进行长期而深入之研究，于国内外学术期刊、国际学术会议与学术专书共计发表研究论文数百余篇及学术专书36册，研究成果丰硕。根据Google Scholar的统计，共获引用27600余次，H影响因子为80次。多项创新发明、理论、技术应用已被收录于国外的教科书。此外，张教授亦曾主持各类基金项目110余项，并有17项专刊(含1项美国专利和2项中国专利)。由于在研究上的卓越贡献，张教授于1998年当选为国际电子电机工程师学会会士(IEEE Fellow)与英国电机工程师学会会士(IET Fellow)。历年指导博士生已毕业者56人，硕士生已毕业者177人。2012年获亚洲信息安全领域终身成就奖。
报告摘要：The computer technologies have grown significantly in the past years. More and more multimedia products such as digital cameras have become popular, so digital images are shared and transmitted widely over Internet. However, transmitting secret or important images, such as military or commercial images, over Internet is very dangerous. Malicious users may monitor Internet and try to eavesdrop these valuable images. To protect these images, visual cryptography is necessary for secure communications over Internet. Herein, secret image sharing can be applied to achieve the goal of visual cryptography. In this speech, I will talk about some visual cryptosystems based on the concept of secret image sharing.
As for the topic of secret image sharing, the secret image sharing scheme uses several noise-like images, called shadows, to replace the original image transmitting over the Internet. The shadows can avoid threats from the illegal persons to access the secret image directly. Secret image sharing techniques were proposed to be another branch outside traditional cryptographic techniques and steganography. Based on sharing secret images, visual cryptography for binary images, grayscale images and color images will be introduced.
