计算机学院学术报告：Researches in Visual Cryptography
时间：2017-06-03 , 作者: ,点击量：52
报告题目：Researches in Visual Cryptography
报告人：Prof.Young-Chang HouVisiting scholar at the Tsinghua University,Beijing,China
Abstract:Visual cryptography is developed based on the need of information sharing.A secret is partitioned into shadow images(shares),and each participant receives only one share.Once any k or more shares of a secret are stacked together,the secret image will be visually retrieved without the help of the computer.The secret image will be invisible if the number of stacked shares is less than k.This speech introduces our studies in extending the capabilities of visual cryptography for handling gray-level and color images.Besides of information hiding,applications of visual cryptography have been extended towards steganography,watermarking and progressive revealing,among others.
Young-Chang Hou was born in Guangdong,China in 1949.He received his BS degree in Atmospheric Physics from National Central University,Taiwan,R.O.C in 1972,his MS degree in Computer Applications from Asian Institute of Technology,Bangkok,Thailand,in1983,and his PhD degree in Computer Science and Information Engineering from National Chiao-Tung University,Taiwan,R.O.C in 1990. From 1976 to 1987,he was a senior engineer of Air Navigation and Weather Services,Civil Aeronautical Administration,Taiwan,R.O.C where his works focused on the automation of weather services.From 1987 to 2004,he was with the faculty at the Department of Information Management,National Central University.From 2004 to 2016,he was a professor with the Department of Information Management,Tamkang University.Currently he works for R.Elamparo enterprises,Philippines.He is a visiting scholar at the Tsinghua University,Beijing China during the period of May and June 2017.He has published more than 100 referred papers in technical journals and conferences.His research interests include digital watermarking and information hiding,fuzzy logic,genetic algorithms,and visual cryptography.