Gemalto Sa

Gemalto Oy

Frédéric Ros

Teemu Pohjola

Christophe Mourtel

Nathalie Launay

Jérôme Borla

This invention relates to a secured identification medium and a method for securing such a medium. The secured identification medium comprises an integrated circuit and, printed on one side, identification information (Ip) about the holder of the medium. It further comprises a set of characteristic attributes Att(Ipi) of the identification information, generated from a capture (Ipi) of the identification information and an extraction algorithm. The set of characteristic attributes of the printed analog image is stored in the integrated circuit and is designed to be compared, during an authentication stage, with a second set of characteristic attributes of the same printed image on the medium.

Secured identification medium and method for securing such a medium

The invention relates to a method for securing a first image by means of graphical anti-counterfeiting means and to a method for securing an identification document with such graphical anti-counterfeiting means. The invention also relates to a secure identification document that allows detecting either a fraudulent modification of the existing personalization or a fraudulent falsified document. For that, graphical anti-counterfeiting image is inserted into an identification image, each image being defined by a plurality of pixels. The characteristic level (for example grey level) of each pixel i of the graphical anti-counterfeiting image is linked, by a function F, to a matrix &#x3a9;i of pixels defined in the identification image, said pixels of the matrix &#x3a9;i surrounding the location i of a pixel of the graphical anti-counterfeiting image, said function F taking into account the characteristic level (for example average grey level) G(&#x3a9;i) and the texture level T(&#x3a9;i) of said matrix &#x3a9;i.

Method for securing an image by means of graphical anti-counterfeiting means, method for securing an identification document, and secure identification document

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Meudon, France

Frédéric Ros