@conference {drm09, title = {Videosurveillance and privacy: covering the two sides of the mirror with DRM}, booktitle = {ACM Workshop on Digital Rights Management (DRM)}, year = {2009}, month = {November}, publisher = {ACM}, organization = {ACM}, address = {Chicago, IL, USA}, keywords = {access control, privacy, rights management, security, videosurveillance, watermarking}, author = {Juan Ram{\'o}n Troncoso-Pastoriza and Pedro Comesa{\~n}a and Luis P{\'e}rez-Freire and Fernando P{\'e}rez-Gonz{\'a}lez} }