Process for simultaneously checking the authenticity of information media and the authenticity of the information itself

摘要

A process for simultaneously checking the authenticity of information media and the authenticity of the information itself which involves scanning a portion of the information written on the media. The results of the scan are transformed into an electrical signal. The signal is analyzed by an appropriate algorithm that registers variations between the information as actually written and a theoretically perfect writing of the same information. The results of this analysis can be stored in the memory of the scanning apparatus or directly onto the media. Then each time the media is handled, the same section of information is rescanned, identically analyzed, and compared to the stored results of the initial scan.