A data carrier having security mark and apparatus for handling such data carrier

P.T. Tuyls (Inventor), J.P.M.G. Linnartz (Inventor)

Research output: PatentPatent publication

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Abstract

The present invention relates to a data carrier (1) having a security mark (2) in which a code is embedded, which security mark is of an optical type. For instance, the mark is of the POWF (Physical One Way Functions) type which gives a speckle pattern for a specific light. From this speckle pattern it is possible to determine a code from which it is possible to get an authentication mark or a decrypting key. In an alternative, it is possible to use a hologram from which a key or authentication mark can be derived by using a unique spatial modulation filter at the level of the analysis of the security mark.
Original languageEnglish
Patent numberWO2005048256
Publication statusPublished - 26 May 2005

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