To authenticate images taken by image capturing elements (3) of offending
vehicles, for example, when exceeding the authorized speed, provided
elements are provided for allowing informative data on the offence to be
supplied, such as the speed of the vehicle, the date, the time and the
place of the offence and various processing methods are provided which
enable, during exploitation of the images, detection of whether or not
manipulations have been carried out on the images.