Roman Tzschoppe Robert Bäuml Robert F. H. Fischer Johannes B. Huber André Kaup Additive non-Gaussian noise attacks on the scalar Costa scheme (SCS). 114-123 2005 conf/sswmc/2005 Security, Steganography, and Watermarking of Multimedia Contents db/conf/sswmc/sswmc2005.html#TzschoppeBFHK05