Information Technology Security Evaluation Criteria (ITSEC) - a Contribution to Vulnerability? - Michael Gehrke; Andreas Pfitzmann; Kai Rannenberg (IFIP Congress (2), 1992)

Eine Sicherheitsarchitektur für kooperative offene Umgebungen. - Michael Gehrke (Oldenbourg, 1994)

Management of a Public Key Certification Infrastructure - Experiences from the DeTeBerkom Project BMSec. - Michael Gehrke; Thomas Hetschold (Comput. Networks ISDN Syst., 1996)

Management of a secure WWW-based document store. - Michael Tschichholz; Michael Höft; Mehran Roshandel; Michael Gehrke (ISADS, 1997)