WO2019149525A1 - Method for checking the authenticity and/or integrity of a security document having a printed security feature, security feature and arrangement for verification - Google Patents

Abstract

The present invention relates to a method for checking the authenticity and/or integrity of a security document (01) having a printed security feature. The method comprises the steps of: irradiating the security document (01) with electromagnetic radiation, recording a plurality of individual images at temporally defined intervals by means of a mobile terminal device (06), checking the captured individual images by means of a data processing unit and outputting the results of the checking. The invention further relates to a printed security feature (02) for a security document (01) and to an arrangement for checking the authenticity and/or integrity of a security document (01).

Description

 Method for authenticity and / or integrity checking of a security document with a printed

 Security feature,

 Security feature and arrangement for verification

The present invention relates to a method for

Authenticity and / or integrity check of a

Security document with a printed security feature. Furthermore, the invention relates to the printed

Security feature for the security document and an order to verify the security document with the security feature.

WO 2013/034471 A1 discloses a device for the mobile recognition of a document with a wavelength conversion property. The device comprises a Lichtzeu generating device, an image pickup device and a

Processor.

In WO 2012/083469 Al a method and a

Device for authenticating documents marked with photochromic systems. The procedure for

Checking the authenticity of a security feature provides that a first and a second image of the security feature are recorded. The appearance of the security feature changes in the visible range under excitation by a flash of light. The first image is taken without the second image using a flash function of a mobile phone. Furthermore, an authentication check can be carried out by the mobile telephone with the aid of a suitable data processing program. From DE 10 2015 219 393 Al a method for the identification of an object is known. On or on the object is an identification feature with several

Identification elements arranged. By irradiation of the identification elements with light in a wavelength range of 380 nm to 790 nm, a first identification feature is visually recognizable.

WO 2013/034603 A1 discloses a method for verifying a security document having a security feature in the form of at least one pigment-type fluorescent printing element.

According to US 2004/0169847 A1, articles for authentication are identified by means of a method for article marking with a unique sequence consisting of patterns.

The patterns may be, for example, photoluminescence patterns.

WO 2017/103119 A1 shows a security element which comprises a first pattern of discrete elements of a first

Material and a second pattern of discrete elements of a second material. A third pattern generated from the superposition of the first pattern with the second pattern is detectable by an image capture unit, wherein the first and / or the second pattern are excited to luminescence.

The third pattern showing an image is compared with a reference image.

Generally, there are many different types

 Security features in a variety of applications are used. Only a few of them are suitable as

Security feature for security documents, such as banknotes, documents, identity cards, identification cards and the like. In this subgroup of security features So far, only a few designs for a trustworthy and difficult to manipulate review with widely available simple devices and devices are suitable.

For example, complex emission properties can be integrated into printable phosphors whose authenticity can only be examined with expensive and complicated test devices, which are only used in a few places, eg. In

Central banks. In particular, there is a lack of simple arrangements, which are available to virtually every end user to check security features and thus a

Checking integrity and authenticity of

To allow security documents.

It is an object of the present invention, starting from the prior art, to provide a method which enables the verification of a security document with a printed security feature. A further object is to provide a security feature which can be printed on a security document or produced using known printing methods during the production of the security document and subsequently has a verification of the security document

Security document. Verification should also be possible with mobile devices, such as a smartphone, using widely available devices. The security feature should be applicable to a variety of security documents or objects. Another task of the present

The invention is an arrangement for the verification of

Security document with this security feature

provide.

According to the solution of the problem by a

Method for verification or authenticity and / or integrity checking for a security document with

Security feature according to the appended claim 1 as well by a printed security feature and an arrangement for verifying the security document with security feature according to the attached independent claims 9 and 13.

The method according to the invention serves for the authenticity and / or integrity check or the verification check of a security document with an imprinted one

Safety feature. The security feature comprises a first printing substance, which by using

Electromagnetic radiation can be excited to luminescence.

The first printing substance is visually invisible and may be printed as a non-visible pattern on the security document. If the security feature is stimulated to luminesce, it also emits radiation beyond the end of the excitation. The first printing substance is chosen so that the emitted radiation occurs in a decay time, so that the radiation can be detected by means of an image acquisition unit of a preferably mobile terminal, wherein the

Decay time and the radiation intensity are chosen so that the emitted radiation is not or almost imperceptible by the human eye (visually invisible), although the emitted radiation may be in the visible spectrum.

Furthermore, the security feature has a second

Printing substance on. The second printing substance may preferably be arranged as a visually visible pattern on the security document. Visible and non-visible patterns may be in the form of simple geometric elements, complex print patterns, or even images or graphics.

In the light of the present invention, the term is

To understand printing substance far, in the sense of a material, with or in which an information can be mapped. In the simplest case, it is an ink with Pigments and / or phosphors. The term "visually invisible" or "visually imperceptible" in the sense of the present invention means that the corresponding information or radiation or pattern can not be detected by the naked eye of the user.

In a first step, this will be done on the

Security document applied security feature irradiated with an electromagnetic radiation of predetermined wavelength by means of a lighting unit of the mobile terminal. As a result of the irradiation, the security feature, in particular the first printing substance, is excited to luminescence. For this purpose, the first printing substance is configured so that it is a non-visible upon excitation with an excitation radiation, as it is emitted by the illumination unit

Shows emission in a wavelength range detectable by an image capture unit of the mobile terminal, and preferably also in a display unit of the mobile

Terminal can be displayed.

In a further method step, emission values of the security feature are detected by means of the image acquisition unit of the mobile terminal. There are several frames of the stimulated security feature in time defined

Generated distances. The frames contain the visually invisible radiation of the first printing substance and an image of the pattern formed by the second printing substance.

The individual images can be stored in a memory or displayed on the display unit after appropriate processing (visualization of the invisible pattern).

In a subsequent method step, the captured individual images are processed by means of a data processing unit

evaluated and used to verify authenticity and / or Integrity used. For verification, the individual images are stored with reference images or the recorded

Emission values compared with stored reference values. The reference images are selected according to the temporally defined recording distances of the individual images. The reference images may in particular be formed by the pattern imaged with the second printing substance.

In a further method step, the result of the verification is output. An issue of a positive one

The result of the authenticity and / or integrity check takes place when the captured individual images agree with the reference images stored in the data processing unit or, if the emission values match, with the

Reference values.

While only one image is compared with a reference in previously known verification methods, it is a particular advantage of the present invention that a recording of several individual images of the stimulated security feature takes place at temporally defined intervals by means of the image acquisition unit of the terminal. The thus detected

Individual images or data derived therefrom can then be stored with stored reference data corresponding to the time

defined shooting distances are compared.

In a preferred method step, the verification of the captured individual images with the deposited

Reference pictures at defined positions of the pictures.

For example, three points are selected at certain positions in the image area of a single image and the corresponding pixels at the specific positions of the reference image are compared with these and compared with them. The

Pictures, in particular their positions, defined and determined point positions and the measured as well as the reference deposited luminescences are compared.

The reference values are preferably in a digital memory, which may be part of the mobile terminal, or an intelligent database on a remote server

deposited .

Preferably, the frames of the excited

Security feature on the security document at intervals of milliseconds (ms). Alternatively, the individual images of the stimulated security feature are preferred on the security document at intervals of

Microseconds (ys) recorded. The decay times of the emission of the first printing substance as well as the time intervals between the individual images are suitably selected in order to be able to record the emission in the individual images.

Preferably, the verification of the detected

Frames with the reference pictures through the

Data processing unit with a data processing

program. Preferably, the data processing program comprises an algorithm for carrying out the steps of

inventive method. Preferably, the algorithm is designed to evaluate cryptographic data or other non-cognitively detectable data, which are encoded, for example, as the invisible or the visible pattern.

Preferably, the data processing unit is part of the mobile terminal.

The image acquisition unit is preferably a photosensor or an image sensor. Particularly preferably, the

Image capture unit a plurality of photosensors, in particular one Camera, which is also sensitive to non-visible radiation and converts this into electrical image signals.

The lighting unit for irradiating the

 Security document is preferably one or more LEDs that produce a white light. The white light can be realized in the course of a flash function of the mobile device.

In particular, the generated light contains radiation in the

Frequency range for the excitation of the first

Pressure substance, so that this to the donation non-visible

Emissions are stimulated.

Preferably, the visually invisible and visually visible patterns of the first and second printing substances are in the same area on the security document

arranged. For example, the non-visible pattern may be directly on a person's portrait of a passport

to be appropriate. Inspection of the invisible pattern would then immediately reveal manipulation if the portrait was altered or replaced, as this will inevitably damage the invisible pattern.

Preferably, the security document is checked online with the mobile terminal, which transmits data to and receives data from a server. Alternatively preferably, the security document is checked offline with the mobile terminal, ie. H. the complete verification is carried out by the mobile terminal and the result of this is displayed.

The method can be used to verify the security feature with defined patterns and materials. An advantage of the method according to the invention is that the security document can be checked in a mobile manner with each mobile terminal equipped with a white LED or white light emitting LED flash function and the corresponding data processing unit. Thus, it becomes particularly possible by capturing physically present security documents there

integrated security features using a conventional mobile device (smartphone, tablet, wearables), which has been configured by a software (App) for the application, to check and the result of the test directly in

to use digital applications. For example, the

Authenticity of a person within an online buying process by photographing an ID card and verifying the authenticity of that ID card. Also, the method is advantageous because it can be used both online and offline. Another advantage is that the verification is quick and easy.

Verification of the security document may also be performed using other data processing systems with image capture units, e.g. As desktop monitors, service terminals or the like.

The printed security feature according to the invention can be applied to a security document, in particular printable during the production of the security document. The

Security feature consists of a visually invisible pattern and a visually visible pattern. The visually invisible pattern is formed by a first printing substance. The first printing substance is through a

Electromagnetic radiation of predetermined wavelength excitable to luminescence, so that the first printing substance a emitted non-visible radiation, not with the

can be seen by an image capture unit of a mobile device and converted into electrical image signals. The visually visible pattern is formed by a second printing substance. The first printing substance is chosen so that upon excitation of this by electromagnetic radiation, in particular irradiated by the flash of the mobile device, a non-visible radiation is emitted from the first printing substance, which by the image acquisition unit of the mobile

Terminal is detectable or readable.

The printed security feature, which on a

Security document is applied, is used to verify the security document, wherein the authenticity and / or integrity is checked. Authenticity is the authenticity and integrity the authenticity of an object. The

Verification of the security document with printed

Security feature can be done with the method described above. The same applies with all

Embodiments. Likewise, the details described below of the security feature of the invention

applicable to the method described above.

In one embodiment, the second printing substance is excitable for luminescence, in which case the two

Printing substances particularly preferably have two different emission spectra and / or decay times.

The cooldowns are preferably in the millisecond range. The printing substances are chosen so that the

Cooldowns in the range of the series or

Single image recording times of the mobile terminal are.

Preferably, the decay times are selected so that after excitation of the first particle with the flash of a conventional smartphones from the camera of the smartphone at least two consecutive images can be recorded in which sufficiently strong emissions of the first particles can be recorded.

It is understandable that the mentioned printing substances can each be composed of several different particle subspecies. For example, it may be particularly advantageous to set the resulting emission properties by a random, inhomogeneous mixture of a plurality of printing substances and then to store these properties specifically for the security document. This allows you to set unique properties for individual security documents or for groups of security documents.

In one embodiment, this is visually invisible

Pattern formed as a machine-readable code. In an alternative embodiment, the visually-visible pattern is formed as a machine-readable code (binary data). Particularly preferably, the visually invisible pattern and the visually visible pattern are formed as a machine-readable code. The machine-readable code is particularly preferably a cryptographic code which has, for example, the form of a barcode, QR code or the like.

The security feature preferably consists of the visually-invisible pattern and the visually-visible pattern, which together form another pattern, which can preferably be displayed by the display unit of the mobile device. For example, to authenticate the security feature, the user of the mobile device may display both patterns on the display unit in an image so that the composite further pattern becomes recognizable. The security feature is preferably applicable to a security document to be tested or to a comparable object to be tested (eg label). Alternatively, the security feature is preferably one to be tested

Security document or in an object to be tested einbringbar.

The security feature can be read by a smartphone, for example.

By evaluating the security feature, in particular its pattern or code, security processes can preferably be processed. Based on the patterns or codes, an object, a process or a user can be identified. Likewise, information or encrypted secrets (eg data key) can be read out in the security feature and used in the further process. This process can be used to further verify integrity. For example, the comparison of decrypted information with data from the security document. For example, a name or an ID number may be stored again as a QR code, so that an "offline check" can be carried out even without access to a remote server or the decrypted information can be compared with data in an external database ("Online check").

The security feature can be used for multifactor authentication. For example, it may be applied to a photograph of a passport, wherein the photo, the decay time of the first printing substance after luminescence excitation of the security feature and the pattern formed by the security feature are checked. Another advantage of the security feature is that

Objects on which it is printed, assigned to a common group or can be distinguished from each other. Furthermore, the authenticity or unadulteratedness can be controlled. It is also advantageous that information can be transmitted by the applied pattern, for example serial numbers.

The arrangement according to the invention serves for the authenticity and / or integrity check or the verification check of a security document. The arrangement includes

Security feature and a mobile device. The

Security feature is on the security document

printed. The security feature corresponds to the security feature described above with all embodiments. The mobile terminal comprises a lighting unit and an image acquisition unit. The lighting unit is designed to emit electromagnetic radiation. The image capture unit is used to detect radiation, in particular non-visible radiation, which is emitted by a non-visible pattern of the security feature after excitation. Furthermore, the serves

 Image acquisition unit of the radiation detection of a visually visible pattern. The non-visible pattern is by a first by means of electromagnetic radiation for

Luminescence stimulable printing substance formed. The visually visible pattern is formed by a second printing substance.

The security document on which the security feature is applied may be, for example, a banknote, a token, a passport or a passport. Further uses of the security feature on z. B. the following items are possible: securities and security documents, stamps,

Banknotes, ID cards, vehicle tickets, bank cards, concert tickets cards, train tickets, food packaging, clothing, spare parts, labels or medicine packaging. The skilled person numerous other uses of security features are known, which should not be excluded here.

Because security feature can also be used for labeling and

Assignment of items, for example in warehouses, or used for product protection.

To apply the printable security feature, preferably applying a defined pattern, one of the following devices can be used, for example: printing press, stamp or spray device.

Preferably, the lighting unit is an LED. Particularly preferably, the lighting unit is a LED that is regularly integrated in mobile terminals for generating white

Light, called white LED. Use white LEDs

a blue LED in combination with a known

Conversion luminescent material.

The mobile terminal is preferably a smartphone. Alternatively, the mobile terminal is preferably a tablet PC with a camera. Furthermore, the mobile terminal may be a smartwatch. In an alternative embodiment, the mobile terminal is part of a smart home system.

Preferably, the lighting unit is a camera of the mobile terminal with flash function. The flash function has the usual lighting times.

Preferably, the image capture unit is a camera of the mobile terminal for taking single, serial images or videos. The image capture unit has the

standard recording time and recording distances.

Further details, advantages and developments of

Invention will become apparent from the following description of a preferred embodiment of the invention, under

Reference to the drawing.

The single FIGURE shows a method step of

Method according to the invention for checking the authenticity and / or integrity of a security document 01 with a printed security feature 02. The security document 01 is an identity document with a feature 03, such as

bibliographic data or a photo of the cardholder. The security feature 02 has a code or a pattern 04. The pattern 04 consists of a first printing substance (not shown) and a second printing substance (not shown). The pattern 04 is arranged on the feature, such as the photo, for multi-factor authentication to occur. The first printing substance is through a

Electromagnetic radiation of predetermined wavelength excitable to luminescence and forms a visually non-visible pattern. The second printing substance forms a visually visible pattern.

In the illustrated method step, the

Security feature 02 by means of a smartphone 06 for

Luminescence stimulated by the flash function of a

Camera (not shown) is activated and emits electromagnetic radiation. The flash function sends a

electromagnetic radiation 07 off.

In further process steps, not shown, a plurality of individual images are recorded by means of the smartphone camera and compared by means of a data processing unit of the smartphone 06 with stored reference images. The comparison takes place on the basis of the images, defined points on the images and on the basis of the luminescence characteristic of the excited first printing substance.

The properties and parameters of phosphor particles or their emissions are known to the person skilled in the art, so that a detailed description of these test steps is dispensed with.

LIST OF REFERENCE NUMBERS

01 security document

02 security feature

03 Photo of the cardholder

 04 patterns

 05

 06 Smartphone

 07 electromagnetic radiation

Claims

1. A method for authenticity and / or integrity checking a security document with a printed security feature, wherein the security feature is a first  Printing substance which is excitable to luminescence and thereby after the end of the excitation within a decay time emitted a visually imperceptible radiation which is detectable by an image acquisition unit of a terminal, and wherein the security feature comprises a second printing substance, comprising the following steps:  - irradiating the safety feature applied to the security document with an electromagnetic  Radiation of predetermined wavelength by means of a  Lighting unit of the terminal;  - Recording multiple frames of the excited  Security feature at timed intervals by means of the image capture unit of the terminal, wherein the individual images emitted visually not  depict perceptible radiation of the first printing substance and an image of the second printing substance;  - Verification of captured frames or from it  derived data by means of a Datenverarbeitungsein unit, wherein the individual images or derived data with stored reference data corresponding to the temporally defined recording distances are compared; and Output of a result of the authenticity and / or integrity check of the acquired individual images with the reference images. 2. The method according to claim 1, characterized in that the verification of the captured individual images with reference images takes place at defined positions of the images. 3. The method of claim 1 or 2, characterized in that from the recorded individual images of the excited security feature by the terminal emission values are determined, in particular emission spectrum and / or radiation intensities at certain times within the decay time. 4. The method according to any one of claims 1 to 3, characterized in that the individual images are recorded at intervals less than a second. 5. The method according to any one of claims 1 to 4, characterized in that the individual images are recorded at intervals less than 100 milliseconds. 6. The method according to any one of claims 1 to 5, characterized  in that the individual images are stored in a memory or, after automatic image processing, are displayed on a display unit. 7. The method according to any one of claims 1 to 6, characterized in that the data processing unit is part of a mobile terminal, and that the image capture unit comprises a photosensor, an image sensor or a camera. 8. The method according to any one of claims 1 to 7, characterized characterized in that the first printing substance is printed as a non-visible pattern and the second printing substance is printed as a visible pattern in a common area on the security document. 9. security feature for a security document, wherein a visually non-visible pattern is formed by a stimulable with an electromagnetic radiation of predetermined wavelength for luminescence first printing substance and a visually visible pattern by a second  Printing substance is formed; and wherein the luminescence-excitable first printing substance emits, upon excitation by the electromagnetic radiation after the end of the excitation within a decay time, a visually imperceptible radiation detectable by an image capturing unit of a terminal. 10. Security feature according to claim 9, characterized in that the second printing substance can be excited to luminescence and the first and the second printing substance have different Liche cooldowns and / or emit in different spectral ranges. 11. Security feature according to claim 9 or 10, characterized in that the visually non-visible pattern and / or the visually visible pattern are formed as a machine-readable code, in particular as non-cognitive detected ble code are formed. 12. Security feature according to one of claims 9 to 11,  characterized in that the security feature can be applied to or introduced into the security document to be checked. 13. Arrangement for checking the authenticity and / or integrity of a security document, comprising: - A security feature according to one of claims 9 to 12, which is attached to the security document; and - A mobile terminal with a lighting unit, which for emitting an electromagnetic  Radiation is formed; with a Bildabssein unit, which the detection of a visually imperceptible radiation of a visually invisible Pattern and a visually visible pattern is used, the non-visible pattern by a first by means of electromagnetic radiation for  Luminescence stimulable printing substance is formed, and wherein the visually visible pattern by a second Printing substance is formed; and with a data processing unit for checking the authenticity and / or integrity of the security document based on the radiation detected by the image capture unit. 14. Arrangement according to claim 13, characterized in that the mobile terminal is a smartphone, a tablet PC or a component of a smart home system. 15. Arrangement according to claim 13 or 14, characterized in that the security feature by means of a printing press, a stamp or a spray device on the  Security document is applied.