@article {pis06:bnsa, title = {Blind Newton Sensitivity Attack}, journal = {IEE Proceedings on Information Security}, volume = {153}, number = {3}, year = {2006}, note = {To appear}, month = {September}, pages = {115-125}, keywords = {data-hiding, watermarking}, author = {Pedro Comesa{\~n}a and Luis P{\'e}rez-Freire and Fernando P{\'e}rez-Gonz{\'a}lez} }