Federated identity and web services. - Paul Madsen (Inf. Secur. Tech. Rep., 2004)

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)

Challenges to Supporting Federated Assurance. - Paul Madsen; Hiroki Itoh (Computer, 2009)