Die elektronische Geldbörse. - Susanne Hennecke; Petra Wohlmacher (Verläßliche IT-Systeme, 1997)

Visionen zur Chipkarte - Gedanken zu Entwicklungen und Anwendungen. - Petra Wohlmacher (Informationstechnik Tech. Inform., 1997)

Applications in Health Care using Public-Key Certificates and Attribute Certificates. - Petra Wohlmacher; Peter Pharow (ACSAC, 2000)

Approaches to Multimedia and Security. - Klara Nahrstedt; Jana Dittmann; Petra Wohlmacher (IEEE International Conference on Multimedia and Expo (III), 2000)

Digital certificates: a survey of revocation methods. - Petra Wohlmacher (ACM Multimedia Workshops, 2000)

Sicherheitsanforderungen und Sicherheitsmechanismen bei IT-Systemen. - Petra Wohlmacher (EMISA Forum, 2000)

Conditional Access for Business and M-Commerce Applications using Annotation Watermarks. - Jana Dittmann; Petra Wohlmacher; Ralf Ackermann (Communications and Multimedia Security, 2001)

Introduction to multimedia and security: protecting the media of the future - securing the future of the media. - Jana Dittmann; Petra Wohlmacher; Klara Nahrstedt (MM&Sec, 2001)

Using Cryptographic and Watermarking Algorithms. - Jana Dittmann; Petra Wohlmacher; Klara Nahrstedt (IEEE Multim., 2001)

Digital Watermarks Enabling E-Commerce Strategies: Conditional and User Specific Access to Services and Resources. - Jana Dittmann; Martin Steinebach; Petra Wohlmacher; Ralf Ackermann (EURASIP J. Adv. Signal Process., 2002)