Gemalto Sa

Gemalto Oy

Christophe Mourtel

Teemu Pohjola

Vincent Dany

Frederic Ros

Valérie Gleize

Frédéric Ros

The invention is a NFC controller able to communicate in contact mode with first and second applications and able to establish and to manage a first communication between a contactless reader device and the first application by using a specific type of contactless protocol. The NFC controller is able to establish and to manage a second communication between the contactless reader device and the second application by using the specific type of contactless protocol. The NFC controller is adapted to handle simultaneously said first and second communications.

Method of managing communications with a NFC controller

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

Guilloches (preventing modification) and watermarking (preventing substitution) technologies are combined to protect a medium, such as a card or a passport. The major idea stems from their dual role for medium authentication: the presence of one is needed to check the validity of the other one. By nature, the guilloche network is visible in the image and easily detectable by image processing. This network is therefore used to generate reference points as elements of synchronization to retrieve watermark information originally embedded in the medium that has submitted an RST transformation. These reference points are by nature stronger than any other means involving invisible templates in the spatial or Fourier space.

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Meudon, France

Christophe Mourtel