Data Hiding in Binary Images with Distortion-Minimizing Capabilities by Optimal Block Pattern Coding and Dynamic Programming Techniques. - I-Shi Lee; Wen-Hsiang Tsai (IEICE Trans. Inf. Syst., 2007)

Data hiding in grayscale images by dynamic programming based on a human visual model. - I-Shi Lee; Wen-Hsiang Tsai (Pattern Recognit., 2009)

Security Protection of Software Programs by Information Sharing and Authentication Techniques Using Invisible ASCII Control Code. - I-Shi Lee; Wen-Hsiang Tsai (Int. J. Netw. Secur., 2010)

A new approach to covert communication via PDF files. - I-Shi Lee; Wen-Hsiang Tsai (Signal Process., 2010)