Surys

Hologram Industries

Marc Pic

Mohammed Amine Ouddan

Hugues Souparis

Gaël Mahfoudi

Fabio Tremolada

Mathieu Hoarau

Enric Meinhardt Llopis

Amine Ouddan

Guillaume Thomas

Frédéric Morain-Nicolier

Florent Retraint

The invention relates to a method for authenticating an illustration, comprising&#x2014;encoding a message in the form of a two-dimensional barcode comprising blocks, each block coding a fragment of said message and comprising a set of coding sub-blocks, each sub-block comprising a set of binary elements. It is essentially characterised in that the encoding comprises prior steps consisting in:&#x2014;defining or identifying a set of noteworthy points in the illustration,&#x2014;calculating a set of attributes depending on certain at least of the noteworthy points,&#x2014;selecting, among the calculated attributes, at least one attribute allowing a digital fingerprint to be defined&#x2014;optionally compressing said digital fingerprint,&#x2014;optionally signing said digital fingerprint by means of a cryptographic signature, and&#x2014;recording in the message one among:&#x2014;a set of at least one attribute,&#x2014;the digital fingerprint,&#x2014;the compressed digital fingerprint, and&#x2014;the signed and optionally compressed digital fingerprint.

Method for authenticating an illustration

The disclosure relates to a method for encoding an illustration, which involves writing the illustration in greyscale or in color, encoding a message in the form of a two-dimensional barcode comprising a set of blocks, each block encoding a fragment of the message and comprising a set of (M) rows and (N) columns, and each block comprising a set of encoding sub-blocks, each subblock comprising a set of bits. It is essentially characterized in that the encoding step comprises defining or identifying a set of remarkable points on the source illustration, calculating a set of attributes according to certain remarkable points, selecting, among the set of attributes, at least one attribute making it possible to define a digital fingerprint, optionally compressed, optionally sign the digital fingerprint, record in the message one of at least one attribute, the digital fingerprint, optionally compressed, the signed digital fingerprint in compressed or non-compressed form.

Methods for encoding a source color illustration, for authenticating an illustration, and related computer media

A method of securing a redundant initial two-dimensional barcode includes providing an initial message having a unique identifier, encoding the initial message as a set of predefined symbols so as to generate a redundant initial two-dimensional barcode having a redundant zone, generating a unique secret character string having a predefined fixed size, encoding the unique secret character string as a set of predefined symbols identical to the symbols used to generate the redundant initial two-dimensional barcode, and inserting the encoded unique secret character string into a redundant zone of the redundant initial two-dimensional barcode, each symbol of said encoded unique secret character string having a predefined position, so as to create a final two-dimensional barcode.

Method of securing a two-dimensional barcode

The method of automatically authenticating a document having a label-forming portion comprises the following steps:

Method and system for authenticating a secure document

Growing community of inventors

Boulogne Billancourt, France

Marc Pic