Computer programs for use in authentication in the field of documents such as driver licenses and passports; Computer programs for use in authentication in the field of documents such as checks, bank notes and other negotiable instruments; Computer programs for use in authentication of consumer goods such as purses, watches, luggage, jewelry, apparel, shoes, home decoration items, and eyeglass frames; Computer programs for use in authentication of industrial parts such as aircraft parts, motor vehicle parts, vessel parts, engine parts; Computer programs for use in authentication of electronic parts and portable electronic devices; Computer programs for use in authentication of motor vehicle parts; Computer programs for use in authentication of containers that contain pharmaceuticals; Computer programs for use in authentication of pharmaceuticals; Computer programs for use in tracking products through a supply chain; Computer programs for use in tracking parcels through a delivery chain; Computer programs for use in tracking luggage from a point of origin to a destination location