Signoptic Technologies

Kerquest

Thierry Fournel

Yann Boutant

Jean-Marie Becker

Laurence Bois

Nathalie Destouches-Castagna

Disclosed is a method for authenticating and/or checking the integrity of a subject, including:&#x2014;visually superimposing, optically or electronically:&#x2014;at least one so-called authentication image of at least one authentication region of an authentic subject, the authentication image including at least one texture of random composition,&#x2014;and, also, the authentication region per se of a candidate subject or at least one verification image of the authentication region of the candidate subject,&#x2014;in the event of observing, on the image resulting from the superimposition, a Glass pattern optical phenomenon in the authentication region, concluding that the candidate subject is the authentic subject and/or the at least partial integrity of the authentication region of the authentic subject.

Method for authenticating and/or checking the integrity of a subject

Disclosed is a method for determining a relational imprint between two images including the following steps: &#x2014;the implementation of a first image and of a second image, &#x2014;a phase of calculating vectors of similarity between tiles belonging respectively to the first and second images, the similarity vectors forming a field of imprint vectors, the field of imprint vectors including at least one haphazard region disordered in the sense of an entropy criterion, &#x2014;a phase of recording in the guise of relational imprint of a representation of the calculated field of imprint vectors. Also disclosed is a method for authenticating a candidate image with respect to an authentic image implementing the method for determining a relational imprint.

Method of augmented authentification of a material subject

The present invention concerns a method for extracting a random signature from a subject material element, comprising:

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Saint-Galmier, France

Thierry Fournel