Service Architecture for Utilizing TINA-based Public Network Services from the Internet Environment. - Yuzo Koga; Kazunori Shiomi; Yutaka Matsushita (LCN, 1998)

Federated identity management for protecting users from ID theft. - Paul Madsen; Yuzo Koga; Kenji Takahashi (Digital Identity Management, 2005)

A Survey on Identity Management Protocols and Standards. - Teruko Miyata; Yuzo Koga; Paul Madsen; Shin-ichi Adachi; Yoshitsugu Tsuchiya; Yasuhisa Sakamoto; Kenji Takahashi (IEICE Trans. Inf. Syst., 2006)