Abstract: The invention relates to a method for determining at least one ophthalmological parameter of a subject, consisting of the subject's semi-pupillary distances, comprising observing the subject's two eyes using an eye tracking device (30) borne by the subject and determining the aforementioned parameter at least from this observation.

Abstract: A method for making an object secure comprises creating a multi-layer graphic signature by superposing, in partial or total transparency, a first random graphic element on a first layer to a second graphic element on a second layer, and storing the graphic signature on or in the object. The method is essentially characterized in that the relative position of the first graphic element and of the second graphic element is random.

Abstract: The invention relates to a method for determining at least one ophthalmological parameter of a subject, consisting of the subject's semi-pupillary distances, comprising observing the subject's two eyes using an eye tracking device (30) borne by the subject and determining the aforementioned parameter at least from this observation.

Abstract: The process comprises a data-acquisition phase with the creation of a database of multicomponent digital signatures constituting fingerprints of identity documents, linked to a central server relocated relative to a primary database comprising variable textual data and images of reference identity documents. A relocated checking phase of identity documents at a checkpoint comprises the digitizing of an identity document to be checked, the creation of a fingerprint of the digitized document, the comparison of the latter with the fingerprint of a document from the fingerprint database indexed with the same reference number and the sending of a message according to the result of the comparison.

Abstract: A method for making an object secure comprises creating a multi-layer graphic signature by superposing, in partial or total transparency, a first random graphic element on a first layer to a second graphic element on a second layer, and storing the graphic signature on or in the object. The method is essentially characterized in that the relative position of the first graphic element and of the second graphic element is random.

Abstract: The process comprises a data-acquisition phase with the creation of a database of multicomponent digital signatures constituting fingerprints of identity documents, linked to a central server relocated relative to a primary database comprising variable textual data and images of reference identity documents. A relocated checking phase of identity documents at a checkpoint comprises the digitising of an identity document to be checked, the creation of a fingerprint of the digitised document, the comparison of the latter with the fingerprint of a document from the fingerprint database indexed with the same reference number and the sending of a message according to the result of the comparison.