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AssigneeIndustry 365 UG (Haftungsbeschränkt)
InventorsJörg Kaufmann, Frank Theeg, Holger Zellmer
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A method for checking the authenticity of products, by checking an image (A) of a product. The proof of authenticity is not visible to the human eye and cannot be copied. This is characterized in that a code stored in a halftone image by manipulation of dots and/or a manipulated field bounded in the halftone image can be read by means of an optical device and compared with a retrievable value in at least one database. In at least one field (F1 to F5) a part of a serial number is determined which describes the structure of the serial number and a hash function used for transmitting the serial number to the database, and this is also characterized in that the serial number is subsequently assembled and encrypted with the corresponding hash function.
A method for checking the authenticity of products, by checking an image (A) of a product, wherein the proof of authenticity is not visible to the human eye and cannot be copied, characterized in that a code stored in a halftone image by manipulation of dots and/or a manipulated field bounded in the halftone image can be read by means of an optical device and compared with a retrievable value in at least one database, wherein in at least one field (F1 to F5) a part of a serial number is determined which describes the structure of the serial number and a hash function used for transmitting the serial number to the database, and in that the serial number is subsequently assembled and encrypted with the corresponding hash function.
A printed image (A) having at least one non-copyable security element, wherein the image (A) is printed from a halftone image with individual dots, characterized in that the image (A) has, within its halftone image, information which can be evaluated in such a way that the image (A) has at least one field (F1 to F5) which has a manipulation of the dots of the halftone image which is not visible to the human eye, and wherein a serial number is displayed by means of contours introduced into the halftone image.
Dependencies are inferred from the claim text.