Abstract: The invention proposes a system and a method for transmitting a message that allows a sender (designated by an identifier) to send a digital content to one or more recipients (designated by one or more identifiers), the content being associated with at least one material subject (each designated by a single authenticator). Thus, to send a message, the sender implements at least one single authenticator of the material subject, discriminant and intrinsic characteristic of each material subject, which serves to anchor the content to transmit. To be able to access the content of the message, the recipient must provide the server not only its identifier, as for any current messaging system, but also a single authenticator with a same material subject that was used at the time the sender created the message.

Abstract: Disclosed is a method for authenticating and/or checking the integrity of a subject, including:—visually superimposing, optically or electronically:—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,—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,—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.

Abstract: The invention proposes a system and a method for transmitting a message that allows a sender (designated by an identifier) to send a digital content to one or more recipients (designated by one or more identifiers), the content being associated with at least one material subject (each designated by a single authenticator). Thus, to send a message, the sender implements at least one single authenticator of the material subject, discriminant and intrinsic characteristic of each material subject, which serves to anchor the content to transmit. To be able to access the content of the message, the recipient must provide the server not only its identifier, as for any current messaging system, but also a single authenticator with a same material subject that was used at the time the sender created the message.

Abstract: Disclosed is a method for determining a relational imprint between two images including the following steps: —the implementation of a first image and of a second image, —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, —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.

Abstract: Disclosed is a method for determining a relational imprint between two images including the following steps: —the implementation of a first image and of a second image, —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, —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.

Abstract: Disclosed is a method for authenticating and/or checking the integrity of a subject, including:—visually superimposing, optically or electronically:—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,—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,—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.

Abstract: A method of producing an authenticatable article. An overt feature is produced in the article using a fabricating technique which is selected based on a material of the article so as to produce the overt feature having predetermined, reproducible macroscopic characteristics as well as random, non-reproducible microscopic characteristics rendering the article physically unique. The overt feature including the microscopic characteristics are imageable using a predetermined imaging technology to produce an overt feature image. An authentication signature is generated based on the overt feature image and stored in a central database. The overt feature may alternatively be produced in an apparatus or means used to manufacture authenticatable articles such that the overt feature including the random, microscopic characteristics is reproduced in the articles. The overt feature and generated authentication code therefore corresponds to articles manufactured using that apparatus or means.

Abstract: The present invention relates to a set of security documents. Each security document within the set having an optical code, notably a barcode, which is neither connected nor coupled to any electronic chip that may be carried by the security document. The optical code on each security document within the set encodes the same information for the same optical reader. Each security document having different respective electromagnetic signature, these signatures being unique to each of the security documents.

Abstract: A method includes: capturing an image of a coin, locating an acquisition area of the image using a landmark of the coin, the acquisition area comprising a feature unique to the coin and generating a digital representation of the acquisition area.

Abstract: A method of producing an authenticatable article. An overt feature is produced in the article using a fabricating technique which is selected based on a material of the article so as to produce the overt feature having predetermined, reproducible macroscopic characteristics as well as random, non-reproducible microscopic characteristics rendering the article physically unique. The overt feature including the microscopic characteristics are imageable using a predetermined imaging technology to produce an overt feature image. An authentication signature is generated based on the overt feature image and stored in a central database. The overt feature may alternatively be produced in an apparatus or means used to manufacture authenticatable articles such that the overt feature including the random, microscopic characteristics is reproduced in the articles. The overt feature and generated authentication code therefore corresponds to articles manufactured using that apparatus or means.

Abstract: The present invention relates to a set of security documents. Each security document within the set having an optical code, notably a barcode, which is neither connected nor coupled to any electronic chip that may be carried by the security document. The optical code on each security document within the set encodes the same information for the same optical reader. Each security document having different respective electromagnetic signature, these signatures being unique to each of the security documents.

Abstract: The present invention concerns a method for extracting a random signature from a subject material element, comprising: a phase to generate at least one acquisition vector of structural characteristics of at least one region of the subject material element, a phase to generate at least one random signature vector from the acquisition vector, the random signature vector comprising: at least one random component having a stable nature so that its value may be found on each implementation of the method on one same region of the subject material element, and/or at least one random component having an unstable nature so that its value is likely to vary random fashion on each implementation of the method on one same region of the subject material element, use of the random signature vector as random signature.

Abstract: The invention concerns a unitary authentication process of a material object consisting of a construction phase of an authenticator system comprising at least: a message image selection step; a support image selection step; a message and support images transformation step to generate at least two shared images according to a transformation process implementing at least a random sequence, the message image not being accessible in each shared image taken individually; a recording step of at least one shared image. According to the invention, in the construction phase of an authenticator each random sequence, the so-called material signature, is extracted or generated from at least one structural characteristic of at least one region of the material object and is liable to be generated on request and obtained identically from the material object.

Abstract: The invention is related to the use of one or several digital signatures obtained from at least one structural characteristic of a material element that has a complex, chaotic, unique and stable structure, to protect the direct reading of sensitive data, a media of such protected data and a method for reading this protected data.

Abstract: A method includes: capturing an image of a coin, locating an acquisition area of the image using a landmark of the coin, the acquisition area comprising a feature unique to the coin and generating a digital representation of the acquisition area.

Abstract: The present invention concerns a method for extracting a random signature from a subject material element, comprising: a phase to generate at least one acquisition vector of structural characteristics of at least one region of the subject material element, a phase to generate at least one random signature vector from the acquisition vector, the random signature vector comprising: at least one random component having a stable nature so that its value may be found on each implementation of the method on one same region of the subject material element, and/or at least one random component having an unstable nature so that its value is likely to vary random fashion on each implementation of the method on one same region of the subject material element, use of the random signature vector as random signature.

Abstract: The present invention concerns a method for extracting a random signature from a subject material element, comprising: a phase to generate at least one acquisition vector of structural characteristics of at least one region of the subject material element, a phase to generate at least one random signature vector from the acquisition vector, the random signature vector comprising: at least one random component having a stable nature so that its value may be found on each implementation of the method on one same region of the subject material element, and/or at least one random component having an unstable nature so that its value is likely to vary random fashion on each implementation of the method on one same region of the subject material element, use of the random signature vector as random signature.

Abstract: An accessory for a portable communicating terminal (T) fitted out with means (C) for processing and acquiring images through at least one optical system (O), an accessory comprising: means (4) for attachment onto the communicating terminal (T), an acquisition window (5) intended to be placed in relationship with the optical system (O) of the communicating terminal (T), illumination means (10) adapted for illuminating an acquisition region included in the field of acquisition of the optical system through the acquisition window (5), means (12) for powering the illumination means, and means (14) for controlling the illumination means.

Abstract: The invention relates to a method for acceptance of a candidate fibrous medium comprising the following steps: a candidate digital signature is generated from a structural characteristic extracted from a reference zone of the fibrous medium, the said digital signature representing the unique, complex, chaotic structure of the reference zone, practically invariable with time; the candidate digital signature is compared with at least one authentic digital signature previously recorded on a digital data medium so as to issue a positive or negative decision about acceptance of the candidate fibrous medium; characterized in that the comparison uses a statistical method to calculate a similarity index between the candidate digital characteristic and the authentic digital signature, and to compare this similarity index with a given acceptance threshold, so as to enable issuing a positive acceptance decision if the candidate digital signature does not exactly correspond to the authentic digital signature with whi

Abstract: An accessory for a portable communicating terminal (T) fitted out with means (C) for processing and acquiring images through at least one optical system (O), an accessory comprising: means (4) for attachment onto the communicating terminal (T), an acquisition window (5) intended to be placed in relationship with the optical system (O) of the communicating terminal (T), illumination means (10) adapted for illuminating an acquisition region included in the field of acquisition of the optical system through the acquisition window (5), means (12) for powering the illumination means, and means (14) for controlling the illumination means.