The following publications are possibly variants of this publication:
- On Privacy in Business Processes - Observing Delegation of Personal Data by using Digital WatermarkingSven Wohlgemuth, Isao Echizen, Noboru Sonehara, Günter Müller. icete 2009: 27-32
- Privacy-compliant Disclosure of Personal Data to Third Parties (Schutz der Privatsphäre bei der Weitergabe persönlicher Daten an Dritte)Sven Wohlgemuth, Isao Echizen, Günter Müller, Noboru Sonehara. it, 52(6):350-355, 2010. [doi]
- Tagging Disclosures of Personal Data to Third Parties to Preserve PrivacySven Wohlgemuth, Isao Echizen, Noboru Sonehara, Günter Müller. isecs 2010: 241-252 [doi]