On the Intractability of Inverting Geometric Distortions in Watermarking Schemes. - Maciej Liskiewicz; Ulrich Wölfel (Information Hiding, 2005)

Provably Secure Steganography and the Complexity of Sampling. - Christian Hundt 001; Maciej Liskiewicz; Ulrich Wölfel (ISAAC, 2006)

Efficient and provably secure steganography. - Ulrich Wölfel (2011)

Grey-box steganography. - Maciej Liskiewicz; Rüdiger Reischuk; Ulrich Wölfel (Theor. Comput. Sci., 2013)

Security levels in steganography - Insecurity does not imply detectability. - Maciej Liskiewicz; Rüdiger Reischuk; Ulrich Wölfel (Theor. Comput. Sci., 2017)