the application runs an algorithm that is used to both corrupt STL files into a visually-illegible state by glitching and rotating the 3D mesh, and to allow a recipient to reverse the effect to restore it back to its original form. The file recipient would need both the application and the unique seven digit settings used by the sender, entering the incorrect settings would only damage the file further. When patent trolls and law enforcement agencies find these files on sharing sites they will only see abstract contortions, but within the trusting community these files will still represent the objects they are looking for, purposely in need of repair. It could also be used to symbolically decommission files and throw away the keys, or to make something inoperative yet still recognisable so that other users would have to request a key to put it into use.