Tzung-Her Chen

TL;DR: A security issue is found in the latest modification of the so-called SAS password authentication scheme and removed to form a new one that not only keeps the original advantages but also highlights a feature, mutual authentication between a user and a remote server, found in many authentication protocols but not in the SAS-like schemes.

TL;DR: This proposed user authentication scheme benefits from combining CAPTCHA techniques and visual secret sharing to ensure deliberate human interaction and provides mutual authentication and is secure against certain known attacks, as well as low in computation cost.

TL;DR: A highly robust watermarking scheme based on Discrete Wavelet Transform (DWT) that is resistant to the counterfeiting attack and the Human Visual System model is adopted to improve the transparency of the watermarked image.

TL;DR: A RG-based VSS scheme with friendliness and progressive secret-reconstruction, and experimental results validated its feasibility, and a theoretical analysis demonstrated its visual quality and security.

TL;DR: This study proposes a new threshold RG-based VSS scheme with better performance compared with the previous thresholdRG-basedVSS scheme, and the experimental results illustrate the feasibility; the better performance is theoretically analysed.