@conference {acm07pedro, title = {On the capacity of stegosystems}, booktitle = {ACM Workshop on Multimedia and Security (MMSEC)}, year = {2007}, month = {September}, pages = {1261-1264}, address = {Dallas, TX, USA}, keywords = {data-hiding, steganography, watermarking}, author = {Pedro Comesa{\~n}a and Fernando P{\'e}rez-Gonz{\'a}lez} }