Weakness and Simple Improvement of a Password Authentication Scheme Based on Geometric Approach. - Wei-Chi Ku; Shen-Tien Chang; Hsi-Hung Chen; Maw-Jinn Tsaur (LCN, 2005)

Impersonation Attack on a Dynamic ID-Based Remote User Authentication Scheme Using Smart Cards. - Wei-Chi Ku; Shen-Tien Chang (IEICE Trans. Commun., 2005)

Weaknesses of a Remote User Authentication Scheme Using Smart Cards for Multi-Server Architecture. - Wei-Chi Ku; Shen-Tien Chang; Min-Hung Chiang (IEICE Trans. Commun., 2005)

Weaknesses of Yoon-Ryu-Yoo's hash-based password authentication scheme. - Wei-Chi Ku; Min-Hung Chiang; Shen-Tien Chang (ACM SIGOPS Oper. Syst. Rev., 2005)