If the difference is within the allowed bounds, then saving or exportation is allowed (310); if not, it is prevented (320). Also provided are a method and a content consumer device performing essentially the same steps before allowing rendering of the content (111)....
Video copy prevention if the difference betweeen the fingerprints before and after its modification is above a thresholdA system for protection against unauthorized modifications of digital content, in particular image content, in which a content processing system (120) retrieves (260) content (111)...