| 2010 | SAC | Cooperation enablement for centralistic early warning systems. | Ulrich Flegel, Johannes Hoffmann, Michael Meier |
| 2010 | SEC | Fraud Detection in ERP Systems Using Scenario Matching. | Asadul K. Islam, Malcolm Corney, George M. Mohay, Andrew J. Clark, Shane Bracher, Tobias Raub, Ulrich Flegel |
| 2009 | COMPSAC | Towards Validating Security Protocol Deployment in the Wild. | Luca Compagna, Ulrich Flegel, Volkmar Lotz |
| 2009 | CRITIS | Towards Early Warning Systems - Challenges, Technologies and Architecture. | Martin Apel, Joachim Biskup, Ulrich Flegel, Michael Meier |
| 2008 | ACSAC | Systematic Signature Engineering by Re-use of Snort Signatures. | Sebastian Schmerl, Hartmut Knig, Ulrich Flegel, Michael Meier, Ren Rietz |
| 2008 | RE | Supporting Evidence-Based Compliance Evaluation for Partial Business Process Outsourcing Scenarios. | Philip Miseldine, Ulrich Flegel, Andreas Schaad |
| 2007 | ACSAC | Efficiency Issues of Rete-Based Expert Systems for Misuse Detection. | Michael Meier, Ulrich Flegel, Sebastian Schmerl |
| 2003 | GI | Ein Architektur-Modell fr anonyme Autorisierungen und berwachungsdaten. | Ulrich Flegel |
| 2002 | GI | Ausgleich von Datenschutz und berwachung mit technischer Zweckbindung am Beispiel eines Pseudonymisierers. | Joachim Biskup, Ulrich Flegel |
| 2000 | CCS | Threshold-based identity recovery for privacy enhanced applications. | Joachim Biskup, Ulrich Flegel |
| 2000 | RAID | Transaction-Based Pseudonyms in Audit Data for Privacy Respecting Intrusion Detection. | Joachim Biskup, Ulrich Flegel |
| 1998 | DBSEC | Secure Mediation: Requirements and Design. | Joachim Biskup, Ulrich Flegel, Ycel Karabulut |