FR3111719A3 - secure authentication process - Google Patents
secure authentication process Download PDFInfo
- Publication number
- FR3111719A3 FR3111719A3 FR2006356A FR2006356A FR3111719A3 FR 3111719 A3 FR3111719 A3 FR 3111719A3 FR 2006356 A FR2006356 A FR 2006356A FR 2006356 A FR2006356 A FR 2006356A FR 3111719 A3 FR3111719 A3 FR 3111719A3
- Authority
- FR
- France
- Prior art keywords
- authentication device
- successive acquisitions
- display screen
- authentication
- lighting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
- G06F21/44—Program or device authentication
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
- G06F21/31—User authentication
- G06F21/36—User authentication by graphic or iconic representation
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- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Software Systems (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Collating Specific Patterns (AREA)
- Credit Cards Or The Like (AREA)
Abstract
L'invention est un procédé d’authentification d’un dispositif d’authentification comportant deux acquisitions successives par un moyen d’acquisition photographique comme un Smartphone, soit depuis des points de vue différents soit sous des conditions d’éclairage différentes. L’innovation est que l’on vérifie que les deux acquisitions successives concernent bien le même dispositif et non pas deux images correspondant chacune à un point de vue différent ou à des conditions d’éclairages différentes.The invention is a method for authenticating an authentication device comprising two successive acquisitions by a means of photographic acquisition such as a Smartphone, either from different viewpoints or under different lighting conditions. The innovation is that we check that the two successive acquisitions indeed concern the same device and not two images each corresponding to a different point of view or to different lighting conditions.
Description
L’invention est un procédé sécurisé pour l’authentification de documents comportant un marquage dont l’apparence change selon le point de vue sous lequel on les observe ou selon l’éclairage.The invention is a secure process for the authentication of documents comprising a marking whose appearance changes according to the point of view under which they are observed or according to the lighting.
Problème techniqueTechnical problem
De nombreuses méthodes d’authentification existent qui consistent à acquérir visuellement un marquage de sécurité, successivement sous plusieurs angles différents ou selon plusieurs éclairages différents. Le principal avantage de tels marquages est qu’ils sont plus difficiles à reproduire ou à falsifier que les marquages dont l’apparence est unique quelle que soit le point de vue sous lequel on les observe ou l’éclairage. Cependant, il reste un moyen de contourner la méthode d’authentification. L’objectif de la présente invention consiste à empêcher un faussaire de les mettre en œuvre.Many authentication methods exist which consist of visually acquiring a security marking, successively from several different angles or according to several different lightings. The main advantage of such markings is that they are more difficult to reproduce or falsify than markings whose appearance is unique regardless of the point of view from which they are observed or the lighting. However, there is still a way to bypass the authentication method. The objective of the present invention is to prevent a counterfeiter from implementing them.
On connait WO 2012/136902 Al de Franck Guigan [FR] qui décrit un procédé d’authentification de marquages dont l’apparence change selon le point de vue sous lequel on les observe ou selon l’éclairage.We know WO 2012/136902 Al by Franck Guigan [FR] which describes a method for authenticating markings whose appearance changes according to the point of view from which they are observed or according to the lighting.
On connait aussi WO2019141915 (A1) de Franck Guigan [FR] qui décrit un procédé d'authentification d’un marquage de ce type en comparant son aspect sous un point de vue à une des descriptions connues choisies comme étant établie depuis un point de vue parmi les plus proches de ce point de vue.We also know WO2019141915 (A1) by Franck Guigan [FR] which describes a method for authenticating a marking of this type by comparing its appearance from one point of view with one of the known descriptions chosen as being established from a point of view among the closest to this point of view.
La présente invention est un procédé d’authentification d’un dispositif d’authentification dont la procédure comporte deux acquisitions successives dudit dispositif par un moyen d’acquisition optique comme par exemple une caméra ou un scanner, soit depuis des points de vue différents soit sous des conditions d’éclairage différentes, caractérisé en ce que l’on vérifie que les deux acquisitions successives concernent bien le même dispositif d’authentification.The present invention is a method for authenticating an authentication device, the procedure of which comprises two successive acquisitions of said device by an optical acquisition means such as, for example, a camera or a scanner, either from different points of view or under different lighting conditions, characterized in that it is verified that the two successive acquisitions indeed relate to the same authentication device.
Description détaillée de l’inventionDetailed description of the invention
La présente invention consiste à vérifier que les deux acquisitions successives concernent bien le même dispositif.The present invention consists in verifying that the two successive acquisitions indeed relate to the same device.
Selon un premier mode de mise en œuvre, le procédé d’authentification comporte la vérification à une fréquence aléatoire de ce que tout ou partie du dispositif est bien vu par le moyen d’acquisition. Le faussaire ne pouvant pas prévoir quand aura lieu cette vérification, il devient très risqué de se servir de la méthode de fraude que la présente invention cherche à empêcher.According to a first mode of implementation, the authentication method includes checking at a random frequency that all or part of the device is indeed seen by the acquisition means. Since the forger cannot predict when this verification will take place, it becomes very risky to use the method of fraud that the present invention seeks to prevent.
Il n’est en effet pas nécessaire de voir tout le dispositif, il suffit qu’une partie de ce dispositif soit vu pour que l’on soit certain que le faussaire n’ait pas pu le remplacer par deux dispositifs différents.It is indeed not necessary to see the whole device, it is enough that part of this device is seen so that we are certain that the counterfeiter could not have replaced it with two different devices.
Avantageusement, le procédé comporte la vérification au moins toutes les demi-secondes, que tout ou partie du dispositif est bien vu par le moyen d’acquisition.Advantageously, the method includes checking at least every half-second that all or part of the device is indeed seen by the acquisition means.
Le procédé peut aussi comporter la vérification que tout ou partie du dispositif est bien vu par le moyen d’acquisition pour toutes les images acquises successivement par lui.The method can also include checking that all or part of the device is indeed seen by the acquisition means for all the images acquired successively by it.
L’essentiel est que l’utilisateur n’ait pas le temps de présenter à la caméra des dispositifs différents pour chacune des acquisitions successives.The main thing is that the user does not have time to present different devices to the camera for each successive acquisition.
Selon un deuxième mode de mise en œuvre, on peut vérifier que le dispositif n’a pas été remplacé par un écran de visualisation d’un dispositif électronique, affichant successivement deux apparences du dispositif d’authentification. Trois méthodes sont préférées.According to a second mode of implementation, it is possible to verify that the device has not been replaced by a display screen of an electronic device, successively displaying two appearances of the authentication device. Three methods are preferred.
La première consiste à faire varier l’éclairage entre les deux acquisitions pour vérifier que l’image acquise est bien modifiée de la façon dont le dispositif d’authentification change d’aspect en fonction de la variation d’éclairage considérée.The first consists in varying the lighting between the two acquisitions to verify that the acquired image is indeed modified in the way the authentication device changes appearance depending on the variation in lighting considered.
La seconde consiste à faire des acquisitions successives avec un faible temps d’ouverture de l’objectif photographique, de façon à détecter des changements d’apparence caractéristiques d’un écran de visualisation d’un dispositif électronique qui n’affiche pas en continu les images mais selon un rythme de rafraîchissement qui lui est propre.The second consists in making successive acquisitions with a short opening time of the photographic lens, so as to detect changes in appearance characteristic of a display screen of an electronic device which does not continuously display the images but according to a refresh rate of its own.
La troisième consiste à modifier entre deux acquisitions la distance entre le moyen d’acquisition et l’image à acquérir pour provoquer des moirages, car ces derniers sont caractéristiques de la résolution de tramage du dispositif d’authentification, laquelle est le plus souvent très différente de celle de l’écran de visualisation d’un dispositif électronique.The third consists in modifying between two acquisitions the distance between the means of acquisition and the image to be acquired to cause moiré patterns, because the latter are characteristic of the dithering resolution of the authentication device, which is most often very different from that of the display screen of an electronic device.
Dans le cas où la vérification de ce que deux acquisitions successives concernent bien le même dispositif d’authentification, la procédure d’authentification est automatiquement recommencée depuis la première acquisition.In the event that the verification that two successive acquisitions indeed concern the same authentication device, the authentication procedure is automatically restarted from the first acquisition.
ApplicationsApps
Les principales applications sont les passeports et cartes d’identité, les permis de conduire et d’une façon générale tous les documents susceptibles d’être falsifiés, ainsi que les marquages utilisés pour la sécurisation des paiements par carte et pour la lutte contre la contrefaçon, les marchés gris et la contrebande.
The main applications are passports and identity cards, driving licenses and in general all documents likely to be falsified, as well as markings used for securing card payments and for the fight against counterfeiting. , gray markets and smuggling.
Claims (1)
Deux acquisitions successives d’images dudit dispositif d’authentification par un moyen d’acquisition optique tel qu’une caméra ou un scanner ;
Une étape de vérification que tout ou partie dudit dispositif est inchangé entre les deux acquisitions successives de l’étape précédente a) et que ledit dispositif d’authentification n’est pas remplacé par un écran de visualisation d’un dispositif électronique ; la dite étape de vérification est réalisée en modifiant les paramètres d’acquisition dudit moyen optique par l’un des moyens suivants:
- Avec une variation d’éclairage entre les deux acquisitions successives permettant de vérifier que l’image acquise est bien modifiée de façon que le dispositif d’authentification change d’aspect en fonction de ladite variation d’éclairage ;
- Avec un faible temps d’ouverture de l’objectif photographique dudit moyen d’acquisition entre les deux acquisitions successives permettant de détecter la présence de l’écran de visualisation dudit dispositif électronique ayant un rythme de rafraichissement propre ;
- Avec une modification de la distance entre le moyen d’acquisition optique et l’image à acquérir ce qui provoque des moirages caractéristiques de la résolution de tramage du dispositif d’authentification, cette dernière étant différente de celle de l’écran de visualisation d’un dispositif électroniqueMethod for authenticating an authentication device characterized in that the method comprises the following steps:
Two successive acquisitions of images of said authentication device by an optical acquisition means such as a camera or a scanner;
A verification step that all or part of said device is unchanged between the two successive acquisitions of the previous step a) and that said authentication device is not replaced by a display screen of an electronic device; said verification step is carried out by modifying the acquisition parameters of said optical means by one of the following means:
- With a variation in lighting between the two successive acquisitions making it possible to verify that the acquired image is indeed modified so that the authentication device changes appearance as a function of said variation in lighting;
- With a short opening time of the photographic lens of said acquisition means between the two successive acquisitions making it possible to detect the presence of the display screen of said electronic device having its own refresh rate;
- With a modification of the distance between the optical acquisition means and the image to be acquired, which causes moiré characteristics of the dithering resolution of the authentication device, the latter being different from that of the display screen d an electronic device
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2006356A FR3111719A3 (en) | 2020-06-18 | 2020-06-18 | secure authentication process |
| PCT/FR2020/000221 WO2021044082A1 (en) | 2019-09-07 | 2020-08-13 | Improved authentication method |
| EP20781045.8A EP4026053A1 (en) | 2019-09-07 | 2020-08-13 | Improved authentication method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2006356 | 2020-06-18 | ||
| FR2006356A FR3111719A3 (en) | 2020-06-18 | 2020-06-18 | secure authentication process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR3111719A3 true FR3111719A3 (en) | 2021-12-24 |
Family
ID=79021936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR2006356A Withdrawn FR3111719A3 (en) | 2019-09-07 | 2020-06-18 | secure authentication process |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR3111719A3 (en) |
-
2020
- 2020-06-18 FR FR2006356A patent/FR3111719A3/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |
Effective date: 20220205 |