Robust Audio Watermarking Based on Secure Spread Spectrum and Auditory Perception Model. - Petar Horvatic; Jian Zhao; Niels J. Thorwirth (SEC, 2000)

Digital watermarking for secure and adaptive teleconferencing. - Jan C. Vorbrüggen; Niels J. Thorwirth (Security and Watermarking of Multimedia Contents, 2002)

Towards fraud-proof ID documents using multiple data hiding technologies and biometrics. - Justin Picard; Claus Vielhauer; Niels J. Thorwirth (Security, Steganography, and Watermarking of Multimedia Contents, 2004)

Semi-automatic registration of videos for improved watermark detection. - Philipp Schaber; Stephan Kopf; Wolfgang Effelsberg; Niels J. Thorwirth (MMSys, 2010)