EP4066151A1 - Procédé et dispositif de marquage sécurisé et procédé et dispositif d'authentification - Google Patents
Procédé et dispositif de marquage sécurisé et procédé et dispositif d'authentificationInfo
- Publication number
- EP4066151A1 EP4066151A1 EP20821132.6A EP20821132A EP4066151A1 EP 4066151 A1 EP4066151 A1 EP 4066151A1 EP 20821132 A EP20821132 A EP 20821132A EP 4066151 A1 EP4066151 A1 EP 4066151A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cell
- bar code
- dimensional bar
- image
- color
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 50
- 239000003086 colorant Substances 0.000 claims description 23
- 210000004027 cell Anatomy 0.000 description 109
- 238000012795 verification Methods 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012015 optical character recognition Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/14—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
- G06K7/1404—Methods for optical code recognition
- G06K7/1408—Methods for optical code recognition the method being specifically adapted for the type of code
- G06K7/1417—2D bar codes
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
- G06K19/06037—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking multi-dimensional coding
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
- G06K19/06046—Constructional details
- G06K19/06056—Constructional details the marking comprising a further embedded marking, e.g. a 1D bar code with the black bars containing a smaller sized coding
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
- G06K19/06046—Constructional details
- G06K19/0614—Constructional details the marking being selective to wavelength, e.g. color barcode or barcodes only visible under UV or IR
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/14—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
- G06K7/1404—Methods for optical code recognition
- G06K7/1408—Methods for optical code recognition the method being specifically adapted for the type of code
- G06K7/1434—Barcodes with supplemental or add-on codes
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
- G06K19/06046—Constructional details
- G06K19/06075—Constructional details the marking containing means for error correction
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K2019/06215—Aspects not covered by other subgroups
- G06K2019/06225—Aspects not covered by other subgroups using wavelength selection, e.g. colour code
Definitions
- the present invention relates to a method and a secure marking device and an authentication method and device. It applies, in particular, to the field of document security and document integrity verification. STATE OF THE ART
- the information storage capacity of two-dimensional bar codes depends mainly on the dimensions of the cells constituting the code and the dimensions of the code.
- some parts of the message do not need to be integrated into the code because they can be reconstructed or recovered after acquiring the available data.
- the present invention aims to remedy all or part of these drawbacks.
- the present invention is aimed at a method for the secure marking of an object, which comprises: a step of determining a maximum dimension of each cell of a two-dimensional bar code defined according to at least two predetermined colors, the maximum dimension of each cell being defined by an area containing a quantity of points,
- the dimensions of the two-dimensional bar code can be reduced since certain information can be made visible or accessible for an automated reading process without affecting the ability of the two-dimensional bar code to be read.
- the remote resource generates at least one question about the image represented by at least one cell of the marked bar code.
- the user can perform a first check of the authenticity of the two-dimensional bar code.
- the information provided by the user can also be used for an authenticity verification calculation on the remote resource.
- At least one cell of the two-dimensional bar code is a fragile anti-copy mark.
- the message is encoded with redundancies and / or an error correction code.
- the image is representative of an alphanumeric character.
- the image is randomly or pseudo-randomly selected from a library of images.
- the secure marking method that is the subject of the present invention further comprises a step of orienting the image in the surface defining the cell.
- the image is represented by a color whose luminance is greater than the luminance of the main color.
- the present invention relates to a device for the secure marking of an object, which comprises:
- main color a means for estimating a minimum quantity of points of a color, among the two colors defining said two-dimensional bar code, called “main color” in a cell of the two-dimensional bar code so that the cell is detected as being of said color by a predetermined reader
- the present invention relates to a method for authenticating an object, which comprises:
- the user can verify the authenticity of the code and / or can provide information to a remote resource to verify the authenticity of the code.
- the present invention relates to a device for authenticating an object, which comprises:
- the terminal comprising:
- FIG. 1 shows, schematically and in the form of a flowchart, a succession of particular steps of the secure marking process object of the present invention
- FIG. 2 shows, schematically, a first particular embodiment of a secure marking device object of the present invention
- FIG. 3 shows, schematically, a first embodiment of a secure marking obtained by a method of the present invention
- FIG. 4 shows, schematically and in the form of a flowchart, a succession of particular steps of the authentication method object of the present invention
- FIG. 5 shows, schematically, a first particular embodiment of an authentication device object of the present invention
- FIG. 6 shows, schematically, a second embodiment of a secure marking obtained by a method of the present invention
- FIG. 7 shows, schematically, a third embodiment of a secure marking obtained by a method of the present invention
- FIG. 8 shows, schematically, a fourth embodiment of a secure marking obtained by a method of the present invention.
- FIG. 9 shows, schematically, a fifth embodiment of a secure marking obtained by a method of the present invention.
- - Point the smallest element to mark an object, for example a point on a physical object relative to a pixel.
- - Cell a set of points defined by at least two dimensions in number of points, the shape of a cell can be any known shape, for example a square, a rectangle or even a circle.
- Two-dimensional bar code a two-dimensional graphic code comprising cells, for example square, each cell being at least one color from two distinct colors
- examples of two-dimensional bar codes are QR codes ( registered trademark, acronym for "Quick Response” in English) or even DataMatrix, Semacodes (registered trademark).
- - Marking the affixing of a digital graphic element on an object, for example by engraving or printing.
- - Fragile anti-copy mark mark whose degradation by noise during marking, that is to say the generation of point errors, individually unpredictable, causing a point to be interpreted with an incorrect value, then copied, can be measured to discriminate an original from a copy.
- the cells and the two-dimensional bar codes are square in shape by way of illustration. Those skilled in the art would know how to use differently shaped two-dimensional cells and bar codes.
- FIG. 1 in the form of a flowchart, is observed a first embodiment of a method 10 for the secure marking of an object, which is the subject of the present invention.
- the secure marking process 10 of an object comprises:
- step of encoding 103 a message in at least part of the cells of the two-dimensional bar code, by definition of the main color, this message representing at least one access to a remote resource,
- the area allocated to the object is chosen by the operator affixing the two-dimensional bar code to the object.
- This operator is the object's manufacturer or its distributor, for example.
- the number of colors in the two-dimensional barcode can influence the amount of information that can be encoded in a two-dimensional barcode.
- Two-dimensional bar codes in order to be read by a predetermined reader, must have cells whose minimum dimensions are specified in the various standards and technical specifications defining these codes.
- minimum cell dimensions and therefore the minimum and maximum dimensions of a two-dimensional bar code can be determined.
- the maximum size of the cells can be determined based on the dimensions of the two-dimensional barcode (which depend on the allocated area) and the amount of information to be encoded.
- centimeters or millimeters are expressed in number of points, for example in dots per inch (acronym "DPI" or "DPI").
- the maximum dimension of the cells is calculated as a function of at least the marking resolution, the area allocated to the object and the quantity of information to be encoded.
- the predetermined color is one of the colors used in a two-dimensional barcode.
- two-dimensional bar codes have two colors, preferably black and white.
- the two-dimensional bar codes have three or more colors.
- the cell must have strictly more than 50% of dots of said color. For example, for a cell size of 10 points by 10 points, at least 51 points must be black for the cell to be detected as black.
- the marking step and the reading step cause random errors, the rate of which is determinable and predictable.
- the rate of marking and reading error, by the predetermined reader is calculated, measured, or estimated. And the minimum amount of dots of a predetermined color is estimated to predict said obtained error rate.
- the encoding step 103 can be carried out by means known to those skilled in the art, for example by means of a symmetric key or an asymmetric key in a manner known to those skilled in the art.
- the color of a cell, as it is to be detected by the predetermined reader is set. Said color is called "main color”.
- the message represents, for example, a website.
- At least one cell of the two-dimensional bar code is a fragile anti-copy mark.
- the error rate is calculated, measured, or estimated to match an original. And the minimum amount of dots of a predetermined color is estimated to predict said obtained error rate.
- the method 10 comprises a step of defining 104 of an image to be represented in said cell, the quantity of points of the image of the color defining the cell being greater than or equal to the minimum estimated quantity. .
- the image can be selected from an image database respecting the constraint concerning the quantity of points of the image of the color defining the cell and the maximum number of colors of the code to be two-dimensional bars.
- the image represents an alphanumeric character.
- the dots of the color whose quantity is greater than or equal to the estimated minimum quantity represent an alphanumeric character.
- the black dots represent the alphanumeric character.
- the image is represented by a color whose luminance is greater than the luminance of the main color. This is because it is common for two-dimensional barcode readers to convert the scanned image to grayscale. Thus, the higher luminance of the image increases the ability of the cell to read as being the correct color since the average gray level detected for the cell is higher in this case.
- the dots other than the dots of the color whose quantity is greater than or equal to the estimated minimum quantity represent an alphanumeric character.
- the black dots represent the alphanumeric character.
- only part of the set of alphanumeric characters may be represented in an image. That is, some characters are considered too close to another character to be represented. Examples of such characters are "O” and "Q” or alternatively "P” and "R”. Only one of the two characters may be represented on the same two-dimensional bar code. This information can be entered in the remote resource.
- the alphanumeric character shown may be in upper or lower case.
- the characters refer to an element of the message.
- the two-dimensional bar code therefore does not need to be recorded, for verification, only the message needs to be decoded.
- the images are randomly or pseudo-randomly selected from a library of images. Within the character frame, the characters are chosen randomly or pseudo-randomly from some or all of the known alphanumeric characters.
- the method 100 includes a step 105 of orienting the image in the surface defining the cell.
- the image can have dimensions equal to the dimensions of the cell, the image can be oriented, for example by making a quarter turn or a half turn with respect to an orientation defined as being a main orientation.
- orientation step 105 each cell can have its own orientation independent of the orientation of neighboring cells with respect to the same main orientation.
- the remote resource generates at least one question on the image represented by at least one cell of the marked bar code.
- Each question can be about the orientation of the image and / or its content.
- the question references the cell on which the question is asked, relative to an element of the two-dimensional barcode.
- the question might be: "In the QR code, what character do you read in the cell in the corner that does not have an orientation stud? "
- the characters related to the question can be stored on a remote resource, the number of characters related to the question is not limited.
- the resulting secure two-dimensional barcode is then marked 106 on the object.
- the marking step 106 is carried out by any means known to those skilled in the art, for example, a printer or a laser for engraving the object.
- the generated two-dimensional bar code is recorded.
- this code is such that the storage capacity of the two-dimensional bar code can only be improved, since part of the message if it does not need to be secret can be integrated into the images of cells.
- verification with the content of cells allows a first authentication of the code and therefore of the object on which it is affixed.
- FIG. 2 represents a first particular embodiment of a secure marking device 20 which is the subject of the present invention.
- the secure marking device 20 of an object comprises: a means 201 for determining a maximum dimension of each cell of a two-dimensional bar code defined according to at least two predetermined colors, the maximum dimension of each cell being defined by an area containing a quantity of points,
- an integration means 204 for at least one cell of the two-dimensional bar code, of an image in said cell, the quantity of points of the color image defining the cell being greater than or equal to the quantity estimated minimum and
- the embodiments of the device 20 are configured to implement the steps of the method 10 and their embodiments as explained above and the method 10 as well as its various embodiments can be implemented by the embodiments of the device 20.
- the means for determining 201, estimating 202, encoding 203 and defining 204 are preferably implemented by a microcontroller implementing the calculations.
- the marking means 205 can be any means known to those skilled in the art, such as a printer or a laser for engraving the object.
- FIG. 3 shows a first embodiment of a two-dimensional bar code obtained by a security method which is the subject of the present invention.
- Figure 3 shows a two-dimensional bar code 301 including an encoded message.
- the encoded message is represented by cells 302, square, white or black.
- the two-dimensional barcode 301 is a QR code recognizable by the three code orientation pins in three corners of the code.
- Image 306 represents an uppercase letter "B" positioned along one side of the cell, here , the left side.
- a border 303 defines the cell for clarity.
- Cell 302 has two dimensions, 304 and 305, along two orthogonal straight lines parallel to the sides of the cell. Since cell 302 is a square, the dimensions 304 and 305 are equal. Dimensions 304 and 305 correspond to seven points.
- the area represented by the cell is 49 points.
- the letter B shown in the image occupies 20 points, or about forty percent of the cell surface.
- FIG. 6 represents a second particular embodiment of a two-dimensional bar code obtained by a security method which is the subject of the present invention.
- the two-dimensional bar code 60 is in the form of a QR code (acronym for "quick response").
- QR code has a square shape and has at least one code reading orientation element, also called a "plot", and a payload space.
- a code reading orientation element is a black square, with another black square on a white background in its center.
- the colors of the orientation element can be adapted depending on the colors used to represent the bar code in two dimensions.
- the message is encoded in black cells 602, with white cells serving as a contrast color to detect and decode the code.
- the QR code comprises three pads 601 positioned at the corners of the square defining the general shape of the QR code.
- the white cells of each pad represent alphanumeric characters.
- the white cells 603 of the payload space also have alphanumeric characters.
- at least four cells in the center of the QR code are replaced by a DataMatrix 604 (registered trademark).
- the DataMatrix 604 is surrounded by white cells, without an image, to facilitate its detection by a reader.
- the DataMatrix 604 has a dimension of six cells by six cells of the QR code.
- Figure 6 shows a SealVector (registered trademark), 605, 606, 607.
- the SealVector has two orientation elements 605 and 606.
- the orientation elements are black circles surrounded by white on a black background.
- the SealVector features a circular shaped payload space 607.
- the center of orientation elements 605 and 606 is calculated, the position of the SealVector being defined relative to the position of said centers. Once the position and orientation of the SealVector, it is possible to decode it.
- FIG. 7 shows a variant of the embodiment shown in FIG. 6 in which the white cells of the pads of the QR code do not represent an image.
- the images are carried by the black cells, that is to say the cells encoding the message.
- Images represent an alphanumeric character surrounded by a black border.
- the border is a square with rounded edges whose dimensions correspond to the dimensions of a black main color cell.
- the images are carried by the black cells, that is to say the cells encoding the message. Images represent an alphanumeric character with a comma.
- At least one cell or each cell may represent a DataMatrix or any other type of two-dimensional bar code.
- FIG. 4 shows a particular embodiment of a method 40 for authenticating an object, which is the subject of the present invention.
- the method 40 comprises: - by means of the predetermined reader 501, a reading step 401 of a secure two-dimensional bar code obtained by a method 10 representative of at least one access to a remote resource,
- a broadcast step 405 of an alert message to the user if the responses do not match, a broadcast step 405 of an alert message to the user.
- At least part of the message representative of at least access to a remote resource is decoded by the reader 501 in a manner known to those skilled in the art.
- a terminal 506 accesses the remote resource.
- the terminal 506 can be a computer ("smartphone" in English), a computer, a digital tablet, or even glasses or a connected watch or any other terminal known to those skilled in the art.
- the terminal 506 and the reader 501 are shown in FIG. 5 in the embodiment of a device 50 for authenticating an object.
- the remote resource displays 402, on a screen 502 of the terminal 506, at least one question relating to the image represented in at least one cell. When several questions are displayed, they can be displayed simultaneously or successively.
- Each question can be about the orientation of the image or its content.
- the question references the cell on which the question is asked, relative to an element of the two-dimensional barcode.
- the question might be: "In the QR code, what character do you read in the cell in the corner that does not have an orientation stud? "
- Questions can be generated randomly when accessing the remote resource, for example.
- the entry can also be voice input or automatic character recognition, for example.
- the entered response is compared with a response contained in a database and / or the message.
- the response contained in a database can correspond to a record of the code generated initially.
- the response contained in the message can depend on the decoding of the message, and correspond to a value of the message, for example a signature or a header of the message.
- the comparison 404 can be performed by a microprocessor 504 of the terminal 506 executing a computer program.
- the alert can be visual, on the screen 502 of the terminal 506 or audible, on an electroacoustic transducer 505 of the terminal.
- the display 402, input 403, and compare 404 steps are iterated at least twice, each iteration involving a different cell.
- terminal 506 can display that information.
- FIG. 5 shows a particular embodiment of a device 50 for authenticating an object, which is the subject of the present invention, which comprises:
- a terminal 506 accessing the remote resource comprising:
- a broadcast medium, 502 or 505, of an alert message to the user if the responses do not match, a broadcast medium, 502 or 505, of an alert message to the user.
- the embodiments of the device 50 are configured to implement the steps of the method 40 and their embodiments as explained above and the method 40 as well as its various embodiments can be implemented by the embodiments of the device 50.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1913380A FR3103935A1 (fr) | 2019-11-28 | 2019-11-28 | Procédé et dispositif de marquage sécurisé et procédé et dispositif d’authentification |
FR1915744A FR3103930B1 (fr) | 2019-11-28 | 2019-12-30 | Procédé et dispositif de marquage sécurisé et procédé et dispositif d’authentification |
PCT/EP2020/083810 WO2021105487A1 (fr) | 2019-11-28 | 2020-11-27 | Procédé et dispositif de marquage sécurisé et procédé et dispositif d'authentification |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4066151A1 true EP4066151A1 (fr) | 2022-10-05 |
Family
ID=73790052
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20821132.6A Pending EP4066151A1 (fr) | 2019-11-28 | 2020-11-27 | Procédé et dispositif de marquage sécurisé et procédé et dispositif d'authentification |
Country Status (3)
Country | Link |
---|---|
US (1) | US20230034244A1 (fr) |
EP (1) | EP4066151A1 (fr) |
WO (1) | WO2021105487A1 (fr) |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5596510A (en) * | 1994-03-23 | 1997-01-21 | Island Graphics | Table-based linear interpolation for color correction system and method |
US5854883A (en) * | 1996-04-04 | 1998-12-29 | Madeley; James Arthur | Color proofing method providing accurate visual simulation of screens |
JP2001287330A (ja) * | 2000-04-10 | 2001-10-16 | Olympus Optical Co Ltd | 光学的に読み取り可能なドットのイメージデータ作成方法及びイメージデータ作成装置、並びに記録媒体 |
US6486902B1 (en) * | 2000-12-26 | 2002-11-26 | Axiohm Transaction Solutions, Inc. | Two-color thermal printing process |
JP3923866B2 (ja) * | 2002-07-19 | 2007-06-06 | 株式会社キーエンス | 二次元コード読取装置設定方法、二次元コード読取設定装置、二次元コード読取装置設定プログラムおよびコンピュータ読取可能な記録媒体 |
US7272474B1 (en) * | 2004-03-31 | 2007-09-18 | Carnegie Mellon University | Method and system for estimating navigability of terrain |
JP4829715B2 (ja) * | 2006-08-09 | 2011-12-07 | キヤノン株式会社 | 画像処理装置、画像処理方法、画像処理プログラム並びに記憶媒体 |
FR2936336A1 (fr) * | 2008-09-23 | 2010-03-26 | Advanced Track Trace | Procede et dispositif d'authentification de codes geometriques |
US20100079811A1 (en) * | 2008-09-29 | 2010-04-01 | Ken Ota | Systems and Methods for Efficient Halftone Screening |
EP2937818B1 (fr) * | 2012-12-19 | 2022-04-20 | Denso Wave Incorporated | Code d'informations, procédé de génération de codes d'informations, dispositif lecteur de codes d'informations et système d'utilisation de codes d'informations |
US9594993B2 (en) * | 2013-11-07 | 2017-03-14 | Scantrush Sa | Two dimensional barcode and method of authentication of such barcode |
SE537836C2 (sv) * | 2014-02-06 | 2015-11-03 | Exeger Sweden Ab | En transparent färgämnessensibiliserad solcell samt ett sättför framställning av densamma |
CN106529633B (zh) | 2015-09-10 | 2019-11-15 | 阿里巴巴集团控股有限公司 | 二维码的生成方法、解码方法以及装置 |
WO2017183718A1 (fr) * | 2016-04-22 | 2017-10-26 | 凸版印刷株式会社 | Corps d'affichage à réseau de diffraction et article étiqueté |
FR3054699A3 (fr) | 2016-07-26 | 2018-02-02 | Franck Guigan | Code barres enrichi |
-
2020
- 2020-11-27 US US17/756,417 patent/US20230034244A1/en not_active Abandoned
- 2020-11-27 WO PCT/EP2020/083810 patent/WO2021105487A1/fr unknown
- 2020-11-27 EP EP20821132.6A patent/EP4066151A1/fr active Pending
Also Published As
Publication number | Publication date |
---|---|
US20230034244A1 (en) | 2023-02-02 |
WO2021105487A1 (fr) | 2021-06-03 |
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