EP3256331A1

EP3256331A1 - Document

Info

Publication number: EP3256331A1
Application number: EP16705091.3A
Authority: EP
Inventors: Andreas Rach; Christoph Maggioni
Original assignee: Bundesdruckerei GmbH
Current assignee: Bundesdruckerei GmbH
Priority date: 2015-02-12
Filing date: 2016-02-12
Publication date: 2017-12-20
Anticipated expiration: 2036-02-12
Also published as: CN107517588B; EP3256331B1; PL3256331T3; DE102015102037A1; WO2016128540A1; CN107517588A

Abstract

The invention relates to a document (100) which comprises: a first document page (101) that has a window (103) which is transparent to light; and a second document page (105) that has a security feature (107) arranged in a predetermined region, the position of the predetermined region on the second document page (105) corresponding to the position of the transparent window (103) of the first document page (101) such that when said first (101) and second (105) document pages are brought together, the security feature (107) can be read through the transparent window (103).

Description

DOCUMENT

The present invention relates to the field of verification of a document.

A document, such as an identification document or value document, is often multi-sided or one-sided. In this case, security features are often applied to several document pages of the document in order to increase the security against forgery of the document. To check the security features applied to the respective document pages, the respective document pages are frequently extensively checked individually.

It is therefore the object of the present invention to provide an efficient concept for verifying a document.

This object is solved by the features of the independent claims. Advantageous forms of further development are the subject of the dependent claims, the description and the drawings.

According to a first aspect, the invention relates to a document comprising: a first document page comprising a light transparent window; a second document page comprising a security feature located in a predetermined area, wherein the position of the predetermined area on the second document page corresponds to the position of the light transparent window of the first document page such that upon merging the first document page and the second document page Security feature through the light transparent window is readable. As a result, the advantage is achieved that, when checking the first document page, the security feature assigned to the second document page can be checked at the same time.

The document may be an identification document, in particular a multi-page identification document, or a value document. Furthermore, the document may be a value print or a banknote. The light-transparent window may be at least partially or partially transparent to light.

The identification document may be one of the following identification documents: identity document, such as identity card, passport, access control card, authorization card, company card, tax stamp or ticket, birth certificate, driver's license or vehicle pass, means of payment, for example a bank card or credit card. The identification document may further comprise an electronically readable circuit, for example an RFID chip. The identification document can be single-layered or multi-layered or paper and / or plastic-based. The identification document can be constructed from plastic-based films which are joined together to form a card body by means of gluing and / or lamination, the films preferably having similar material properties.

The first document page and the second document page may be adjacent document pages or document sheets of the document. Furthermore, the respective document pages can be connected to each other by book binding. For example, the respective document pages are connected to each other by thread stitching, wire stitching or adhesive binding. Further, the respective document pages may be formed by folding or folding a document sheet. The respective document pages can also be made of a light-transparent material.

The light transparent window may be formed by a breakthrough in the first document page. In this case, the breakthrough may be covered with a light-transparent film. The security feature may be an optical security feature such as a hologram, a kinegram, an identigram or other feature such as a printed or otherwise applied pattern.

According to one embodiment, a further security feature is formed in the light-transparent window, and the security feature and the further security feature complement one another to form an overall security feature. This provides the advantage that the security against forgery of the document can be further increased. The further security feature can be arranged on a light-transparent film which covers or forms the light-transparent window.

According to one embodiment, the security feature and / or the further security feature can be read out by means of light in the visible wavelength range, in the infrared wavelength range and / or in the ultraviolet wavelength range. As a result, the advantage is achieved that the security feature and / or the further security feature can be detected optically. For example, the security feature or the further security feature in the visible wavelength range can be completely or completely read, while in the infrared wavelength range only parts of the security feature or the further security feature can be read out. Thus, a matrix can also be formed, for example with infrared surfaces or UV surfaces, which encodes data of the document, such as personal data or document data. The security feature and / or the further security feature can each have individual graphical elements, for example letters, numbers or graphic patterns, which can be read out, each with the same or different wavelength ranges, for example in the infrared range and / or in the ultraviolet range. For this purpose, the individual elements can be printed with the same or different printing inks, which have different optical properties in different wavelength ranges and are, for example, reflective or absorbing.

According to one embodiment, the security feature may comprise a number of first individual graphical elements which are readable when illuminated with white light or light in the visible wavelength range, and a number of second individual graphical elements which are readable when illuminated with white light and / or infrared light.

According to one embodiment, the security feature may comprise a number of first individual graphical elements which are readable upon illumination with white light and / or infrared light, and a number of second individual graphical elements which are readable upon illumination with ultraviolet light. According to one embodiment, the security feature may comprise a number of first individual graphical elements which are readable when illuminated with white light and / or infrared light, and the further security feature may comprise a number of second individual graphical elements which are readable when illuminated with white light and / or infrared light, exhibit.

According to one embodiment, the security feature may include a number of first single graphical elements that are readable upon illumination with white light and / or infrared light, and the further security feature may include a number of second single graphical elements that are readable upon illumination with ultraviolet light.

According to one embodiment, the overall security feature formed by the security feature and the further security feature may form a checksum, in particular an alphanumeric checksum. For example, the checksum is a checksum of a document date or a person's date.

According to one embodiment, the overall security feature formed by the security feature and the further security feature may form a code, in particular a bar code, a 2D code or a 3D code. For example, the code encodes a document date or person data, or a checksum, hash, or digital signature thereof.

According to one embodiment, the security feature may be formed on a passport inside of the document.

According to one embodiment, the light transparent window may be formed in a data page of the document.

According to one embodiment, the security feature and the further security feature may be disposed on opposite sides of the document. As a result, a combination of the further security feature in the light-transparent window and the security feature on the opposite side can be achieved. According to one embodiment, the security feature can be readable for a machine or with a machine, especially in the case of illumination with white light or light in the visible wavelength range, and can at the same time be the further security feature for the machine or be readable by the machine. As a result, a false rejection in a test of the document without the opposite side can be avoided.

According to one embodiment, the security feature comprises a code. As a result, the advantage is achieved that a coded information can be read out of the security feature. The code may encode information for verifying the document. For example, the code encodes a document date, such as the manufacturer's name, the document, or a person's date, such as a name, of a document's owner. By comparing the information with the information printed on the document, the document can be checked.

According to one embodiment, the document is an identification document of a person, and the code comprises a coded person data. This achieves the advantage that a manipulation of a person's date printed on the document can be detected by comparison with the decoded code.

According to one embodiment, the code comprises information coded by means of one of the following methods, in particular a person data coded by means of one of the following methods: digital signature of the coded information, asymmetric coding of the information by means of a cryptographic key, or symmetric coding of the information by means of a cryptographic key, or the code comprises a checksum or a hash value, in particular a checksum or a hash value of a person's date, a document date or a part of a person's date or document date. This provides the advantage that the document can be efficiently checked for tampering.

The person's date may be a name, birthday, birthplace or a personnel number of the owner of the document. Furthermore, the document date can be a validity date, a serial number or the name of the document manufacturer of the Document. Further, the person date or the document date may be printed on the document. The printed person date or document date can be checked by means of the decodable from the code information to detect a manipulation of the printed person date or document date. For example, the information comprises a hash value of the name of the owner of the document formed by means of the standard Message-Digest Algorithm 5 (MD5) or a standard of the standard family Secure Hash Algorithm (SHA).

According to one embodiment, the code is an optically detectable code, in particular a bar code or a multi-dimensional code. As a result, the advantage is achieved that the code can be detected by means of a cost-effective optical code reader. For example, the code is a bar code according to one of the standards Code 93, Codabar, or Code128, a quick-response (QR) code, a point code, an Aztec code, an Aztec matrix code, a data code, or any other machine-readable code Code. According to one embodiment, the document is an identification document of a person and has a document page with a person's date, wherein the security feature includes or provides the person's date, in particular coded. This has the advantage that the person's date on the document page can be checked efficiently. The document page may be the first document page.

According to one embodiment, the light transparent window is formed by a breakthrough in the first document page. As a result, the advantage is achieved that the light-transparent window can be integrated particularly cost-effective in the first document page. For example, the light transparent window is punched out of the first document page.

In one embodiment, the aperture is covered with a light transparent film. This provides the advantage that the forgery-proofing of the document can be increased by integrating a security element that is difficult to falsify. The light transparent film may be a light transparent plastic film, for example made of polyvinyl chloride (PVC). According to one embodiment, a further security feature is formed in the light-transparent window. The further security feature can be formed, for example, in or on a light-transparent film which forms or covers the light-transparent window. The further security feature may have or supplement the features of the above-mentioned security feature.

The further security feature can furthermore be light-transparent in a specific wavelength range, for example completely or partially in an ultraviolet wavelength range or in the white-light wavelength range, so that the security feature can be read out through the further security feature. In a further wavelength range, for example in the infrared wavelength range, the further security feature, however, can act absorbing or reflective, so that the further security feature can be read in this wavelength range.

According to a second aspect, the invention relates to a document, in particular a one-page document such as a document of value or a banknote or an identification card, having a document page which comprises a light-transparent window in a first wavelength range, wherein in the light-transparent window a security feature is formed, which in a second wavelength range is readable.

The security feature can be formed, for example, in or on a light-transparent film which forms or covers the light-transparent window. The security feature may have the features of the aforementioned security feature and / or the further security feature.

The security feature is light-transparent or reflective or absorbing in the first wavelength range, for example in an ultraviolet wavelength range or in the white-light wavelength range. By contrast, in the second wavelength range, for example in the infrared wavelength range, the security feature can have an absorbing or reflective or light-transparent effect, so that the security feature can be read out in the first or the second wavelength range. According to a third aspect, the invention relates to a document reader for reading out a security feature of a document, the document comprising a first document page with a light transparent window and a second document page with the security feature, wherein the security feature is arranged in a predetermined area, wherein the position of the predetermined Area on the second document page corresponds to the position of the light transparent window of the first document page, so that when merging the first document page and the second document page, the security feature is readable through the light transparent window, and wherein the document reader comprises the following features: an image pickup device for optical Detecting the light transparent window to obtain an image with the security feature; and a processor for detecting the security feature based on the image. This provides the advantage that the security feature can be read efficiently.

The document reader may be an ID document reader or an element of a self-service terminal, a vending machine, a

Working time recording system or an access control system.

The document may be the document according to the invention. Furthermore, the image recording device can be designed to record an image, for example in the infrared, visible and / or ultraviolet wavelength range, of the document. The image recording device may further comprise an image sensor, a lighting element for illuminating the document and / or a lens. For example, the image pickup device is formed by an image camera or a scanning line, such as a scanning line of a flatbed scanner. Furthermore, the processor may be configured to detect the position of the light-transparent window in the image and / or the position of the security feature in the image by means of pattern recognition.

According to one embodiment, the processor is configured to determine a position of the light transparent window in the image and to detect the security feature at the determined position of the light transparent window. This provides the advantage that the security feature can be detected efficiently. In one embodiment, the processor is configured to detect a position of the light transparent window in the image by detecting edges or a contour of the light transparent window. This provides the advantage that the position of the light transparent window can be efficiently determined. According to one embodiment, the document reader further comprises a light source, in particular a white light source, an infrared light source or an ultraviolet light source, which is designed to illuminate the security feature through the light transparent window. As a result, the advantage is achieved that an external light source for illuminating the security feature or the document can be omitted.

According to one embodiment, the document reader further comprises a document support on which the document can be placed. This achieves the advantage that the optical detection of the light-transparent window can be facilitated by means of the image recording device by determining the position of the document.

According to one embodiment, the image recording device is formed by an image camera or a scanning line. This provides the advantage that the light transparent window can be detected efficiently.

According to one embodiment, the processor is further configured to detect a code included in the security feature. This provides the advantage that the security feature can be evaluated efficiently. In one embodiment, the processor is further configured to decode the code to obtain decoded information. As a result, the advantage is achieved that an encoded in the code information can be read.

According to one embodiment, the processor is further configured to check an information applied to the document by means of the decoded information. This provides the advantage that the document can be checked for tampering. According to one embodiment, a further security feature is formed in the light-transparent window. The further security feature can be light-transparent in a specific wavelength range, for example in an ultraviolet wavelength range or in the white-light wavelength range, so that the security feature can be read out through the further security feature. In a further wavelength range, for example in the infrared wavelength range, the further security feature, however, can act absorbing or reflective, so that the further security feature can be read in this wavelength range. For detecting the further security feature, the image recording device can record an image of the light-transparent window in a wavelength range in which the further security feature has a reflective or absorbing effect. To read the security feature, the image recording device can record an image in a wavelength range in which the further security feature is transparent, for example in the white-light wavelength range or in the ultraviolet wavelength range.

According to one embodiment, the security feature and the additional security feature may complement each other in the light transparent window. This may produce an overall security feature or pattern that will be visible when both sides of the document are superimposed as determined. This makes the document very easy to check.

According to one embodiment, the security feature and the further security feature in the light-transparent window may complement one another to form a matrix code or form a matrix coding. Different black colors can be used here. By way of example, the security feature has an IR-absorbing black color and the further security feature an IR-transparent black color or vice versa, wherein the respective black color in the visible wavelength range appears to be black to a viewer or the security feature and the further security feature are in the non-visible UV Range, in particular as a feature.

The document reader can also be designed to detect the security feature according to the second aspect. According to a fourth aspect, the invention relates to a method for reading out a security feature of a document, the document comprising a first document page with a light transparent window and a second document page with the security feature, wherein the security feature is arranged in a predetermined area, wherein the position of the predetermined Area on the second document page corresponding to the position of the light transparent window of the first document page, so that when merging the first document page and the second document page, the security feature is readable through the transparent window, and wherein the method comprises the following features: optically detecting the light transparent Window by means of an image pickup device to obtain an image with the security feature; and detecting the security feature based on the image by means of a processor. This provides the advantage that the security feature can be read efficiently. The method for reading out a security feature of a document can be carried out by means of the document reader according to the invention. Further features of the method for reading out a security feature of a document arise directly from the functionality of the document reading device according to the invention.

The invention can be implemented in hardware and / or software.

Further embodiments will be explained with reference to the accompanying drawings. Show it:

Fig. 1 is a schematic representation of a document according to an embodiment;

Fig. 2 is a schematic representation of the document according to another embodiment;

Fig. 3 is a schematic representation of a document reader;

Fig. 4 shows an arrangement with the document and the document reader; 5 shows a schematic representation of a method for reading out the security feature of the document;

Fig. 6 is a document; and

Fig. 7 shows the document according to another embodiment.

1 shows a schematic representation of a document 100 according to an embodiment. The document 100 has a first document page 101 with a light-transparent window 103 and a second document page 105 with a security feature 107.

The document 100 is formed with: the first document page 101 including the light transparent window 103; the second document page 105 including the security feature 107 arranged in a predetermined area, wherein the position of the predetermined area on the second document page 105 corresponds to the position of the light transparent window 103 of the first document page 101, so that when merging the first document page 101 and the second document page 105, the security feature 107 can be read out through the light-transparent window 103.

The document 100 may be an identification document or a value document. Further, the document 100 may be a value print or a banknote. The identification document may be one of the following identification documents: identity document, such as identity card, passport, access control card, authorization card, company card, tax stamp or ticket, birth certificate, driver's license or vehicle pass, means of payment, for example a bank card or credit card. The identification document may further comprise an electronically readable circuit, for example an RFID chip. The identification document can be single-layered or multi-layered or paper and / or plastic-based. The identification document can be constructed from plastic-based films, which are joined together to form a card body by means of gluing and / or lamination, the films preferably having similar material properties.

The first document page 101 and the second document page 105 may be adjacent document pages or document sheets of the document 100. Furthermore, the respective document pages 101, 105 may be connected to one another by book binding. For example, the respective document pages 101, 105 are connected to each other by thread stitching, wire stitching or adhesive binding. Further, the respective document pages 101, 105 may be formed by folding or folding a document sheet. The respective document pages 101, 105 may also be made of a light transparent material.

The light transparent window 103 may be formed by an opening in the first document side 101. In this case, the breakthrough may be covered with a light-transparent film. The security feature 107 may be an optical security feature such as a hologram, a kinegram or an identigram.

FIG. 2 shows a schematic representation of the document 100 according to a further embodiment. The document 100 has the first document page 101 with the light transparent window 103 and the second document page 105 with the security feature 107.

On the first document page 101 are also a label field 201, which indicates the document type of the document 100, an image 203 of the owner of the document 100, a person data 205, in particular a name, the owner of the document 100 and a machine-readable zone 207, such as a machine Readable Zone (MRZ), arranged.

The first document page 101 may form or include a data sheet or a data page of the document 100. Further, the translucent window 103 may form or include a transparent portion, such as a window. FIG. 3 shows a schematic illustration of a document reading device 300. The document reading device 300 comprises an image recording device 301 and a processor 303.

The document reader 300 for reading out the security feature 107 of the document 100, wherein the document 100 comprises the first document page 101 with the light transparent window 103 and the second document page 105 with the security feature 107, wherein the security feature 107 is arranged in a predetermined area, wherein the position of the predetermined area on the second document page 105 corresponds to the position of the light transparent window 103 of the first document page 101, so that when merging the first document page 101 and the second document page 105, the security feature 107 is readable through the translucent window 103, includes the following features the image pickup device 301 for optically detecting the light transparent window 103 to obtain an image with the security feature 107, and the processor 303 for detecting the security feature 107 from the image.

The document reader 300 may be an ID document reader or an element of a self-service terminal, a vending machine, a time attendance system, or an access control system.

Furthermore, the image recording device 301 can be designed to record an image, for example in the infrared, visible and / or ultraviolet wavelength range, of the document 100. The image recording device 301 may further comprise an image sensor, a lighting element for illuminating the document 100 and / or a lens. For example, the image pickup device 301 is formed by an image camera or a scan line. Furthermore, the processor 303 may be configured to detect the position of the light transparent window 103 in the image and / or the position of the security feature 107 in the image by means of pattern recognition.

FIG. 4 shows an arrangement with the document 100 and the document reader 300. The document 100 has the first document page 101 with the light-transparent window 103 and the second document page 105 with the security feature 107. Further, the first document page 101 and the second document page 105 are connected to each other via a document back 403. According to one embodiment, the respective document pages 101, 105 may be formed by folding or folding a document sheet. The resulting fold can also form the back of the document 403. The document reader 300 further includes the image pickup device 301, the unimaged processor 303, and a housing 401. In this case, the document reader 300 is arranged on the document 100 in such a way that the security feature 107 can be read out through the light-transparent window 103. According to one embodiment, the image capture device 301 may include a scan line and / or an image camera.

According to an embodiment, the second document page 105 may be an opposite side or a neighbor side of the first document page 101.

According to one embodiment, the second document page 105 may be an inside of a cover or cover of the document 100. For example, the second side 105 is an inside of a front cover or passport cover of a passport, such as a German passport.

5 shows a schematic representation of a method 500 for reading out the security feature 107 of the document 100. The method 500 comprises the method steps 501 and 503. The method 500 for reading out the security feature 107 of the document 100, wherein the document 100 includes the first document page 101 the light transparent window 103 and the second document page 105 having the security feature 107, wherein the security feature 107 is arranged in a predetermined area, the position of the predetermined area on the second document page 105 corresponding to the position of the light transparent window 103 of the first document page 101, so that when merging the first document page 101 and the second document page 105, the security feature 107 is readable through the light transparent window 103, comprises the following features: optical detection 501 of the light transparent window 103 by means of the image pickup device 301 to obtain an image with the security feature 107; and detecting 503 of the security feature 107 based on the image by means of the processor 303.

According to one embodiment, the light transparent window 103 may be formed by a transparent see-through window. Furthermore, the security feature 107 may form a security feature for the light transparent window 103.

According to one embodiment, the background of the light transparent window 103 may be unknown if the first document page 101 and the second document page 105 are not merged or the second document page 105 is missing. For example, in this case, the background is a hand of a controller of the document 100 or a lid, such as a passport cover, of the document 100. Here, the lid or passport cover can form a document page that can carry the security feature 107. Furthermore, passport covers, and in particular their insides, frequently have security features, for example security features created by intaglio printing or UV printing.

According to one embodiment, light-transparent windows 103, such as window elements, may be suitable as security features in value presses, such as banknotes or identification documents, since they form a transparent, transparent area in an otherwise non-transparent or less transparent material. Furthermore, light transparent windows 103 are difficult to imitate or counterfeit, easily manually testable and obvious. According to one embodiment, an automated or automatic examination of the document 100 with the light transparent window 103, such as a see-through window, can be made possible by the light transparent window 103, like a transparent window element, granting a clear view of the security feature 107, which adjoins on a neighboring side same position. When the document 100, such as a passport, is placed and scanned on the document reader 300, such as an ID document reader, for automated or automatic inspection, the neighbor side security feature 107 may be checked at the location of the light transparent window 103, such as a window element , The security feature 107 may be a feature in visible light spectrum or in other wavelengths, such as IR or UV, to be hidden to the human eye. Furthermore, the security feature 107 may be a personalized feature that allows for a reference or affiliation between a personalized data page and a passbook of the document 100. The security feature 107 can also be a code, for example with a digital signature or hash value of the manufacturer and / or personal data or document data. For example, the security feature 107 is a representation of one or more numbers or a shape of a barcode or other matrix pattern. According to one embodiment, the method 500 may provide automated or automated testing of the translucent window 103 or window elements of the document 100.

According to one embodiment, by arranging the light-transparent window 103 and the security feature 107 on the document 100, a security, in particular an anti-counterfeiting, of the document 100, such as a value printing or identification document, can be increased.

According to one embodiment, by arranging the light transparent window 103 and the security feature 107 on the document 100, a higher protection against exchange of personalized data pages can be achieved. For example, a manipulated passbook with a manipulated data page can be recognized if they refer to each other directly or by coding. According to one embodiment, the document 100 can provide a higher level of protection and automatic auditability on the authenticity of personal data and / or document data, such as name, age, expiration date, or document number, when this data is included in the security feature 107, for example by means of the code. Further, even higher protection and automatic verifiability of personal data and / or document data, such as name, age, expiration date or document number, may be included in security feature 107, for example by means of the code, and use of cryptographic encryption, especially in asymmetric signature can be achieved.

According to one embodiment, the document 100 may be a value print, such as a banknote, or an identification document.

In one embodiment, the translucent window 103 may form a transparent, transparent surface in an otherwise nontransparent or less transparent material. According to one embodiment, the light transparent window 103 can be easily checked manually.

According to one embodiment, an automatic inspection of the light transparent window 103 may be difficult since nothing can be detected in the region of the light transparent window 103.

According to one embodiment, the security feature 107 may form an automatically-verifiable feature that is visible through the translucent window 103. In this case, the security feature 107 and the light transparent window 103 can be arranged on adjacent document pages of the document 100.

According to one embodiment, the security feature 107 can be testable or readable in the visible light spectrum, in the infrared light spectrum and / or in the ultraviolet light spectrum.

According to one embodiment, the security feature 107 may be half or full in the infrared light spectrum or in the ultraviolet light spectrum testable or readable.

According to one embodiment, the security feature 107 may be personalized and / or form a referencing between the data page and the passbook of the document 100. For example, the security feature 107 includes or encodes a checksum over the machine-readable zone 207 of the document 100. According to one embodiment, the security feature 107 may encode a digital signature or a hash value of the manufacturer and / or the personal data or the document data of the document 100.

According to one embodiment, the method 500 can be used to create an automatic check option for a referencing between the passport book and the data page of the document 100.

According to one embodiment, the document 100 can be used to achieve a higher protection against the exchange of personalized data pages, for example a stolen passbook with a new counterfeit data page.

According to one embodiment, the document 100 can be used to achieve a higher level of protection and automatic testability for the authenticity of personal data and / or document data, for example name, age, expiration date and / or document number, in particular if this data is included in the security feature 107 an even higher level of protection when using cryptographic encryption, especially with asymmetric signature, of this data can be achieved. 6 shows a document 600, in particular a one-sided document such as a document of value or a banknote or an identification card, with a document page 601 which comprises a light-transparent window 603 in a first wavelength range, wherein a security feature 605 is formed in the light-transparent window 603, which is readable in a second wavelength range.

The security feature 605 can be formed, for example, in or on a light-transparent film which forms or covers the light-transparent window 603. The security feature 605 may include the features of the aforementioned security feature and / or the further security feature.

The security feature 605 is in the first wavelength range, for example in an ultraviolet wavelength range or in the white light wavelength range, translucent or reflective or absorbing. On the other hand, in the second wavelength range, for example in the infrared wavelength range, the security feature 605 can have an absorbing or reflective or light-transparent effect so that the security feature 605 can be read out in the first or the second wavelength range.

The document 600 can be read out by means of the document reader 300.

FIG. 7 shows the document 600 according to a further embodiment. The document 600 has a second document page, not shown, which is arranged behind the document page 601. On the second side of the document another security feature 701 is arranged, which is visible through the light transparent window 603 therethrough. In this case, the security feature 605 and the further security feature 701 complement each other in the light transparent window 603. In this way, an overall security feature or a pattern can be generated which becomes visible when both sides of the document 600 are superimposed according to their destination. As a result, the document 600 can be checked particularly easily.

LIST OF REFERENCE NUMBERS

100 document

101 First Document Page 103 Light-Transparent Window 105 Second Document Page

107 security feature

201 labeling field

203 picture

205 person date

207 Machine readable zone

300 document reader

301 image pickup device 303 processor

401 housing

403 document back 500 procedures

501 Capture

503 Capture

600 document

601 document page

603 windows

605 security feature

701 Another security feature

Claims

1 . A document (100), comprising: a first document page (101) comprising a translucent window (103); a second document page (105) comprising a security feature (107) arranged in a predetermined area, the position of the predetermined area on the second document page (105) being the position of the light transparent window (103) of the first document page (101) corresponds, so that when merging the first document page (101) and the second document page (105), the security feature (107) through the light transparent window (103) is readable therethrough.

2. Document (100) according to claim 1, wherein the security feature (107) is readable by means of light in the visible wavelength range, in the infrared wavelength range or in the ultraviolet wavelength range.

The document (100) of claim 1 or 2, wherein the security feature (107) comprises a code.

The document (100) of claim 3, wherein the document (100) is an identification document of a person, and wherein the code comprises an encoded person's date.

The document (100) of claim 3 or 4, wherein the code comprises information encoded by one of the following methods, in particular a personal data encoded by one of the following methods: digital signature of the encoded information, asymmetric encoding of the information by means of a cryptographic key , or symmetric coding of the information by means of a cryptographic key, or wherein the code comprises a checksum or a hash value, in particular a checksum or a hash value of a person's date, a document date or a part of a person's date or document date.

6. Document (100) according to claim 3, 4 or 5, wherein the code is an optically detectable code, in particular a bar code or a multi-dimensional code.

The document (100) of any of the preceding claims, wherein the document (100) is a person's identification document and has a document page with a person's date, wherein the security feature (107) includes or provides the person's date, in particular.

8. Document (100) according to one of the preceding claims, wherein in the light-transparent window (103), a further security feature is formed, and wherein the security feature (107) and the further security feature complement each other to an overall security feature.

9. Document (600), with a document page (601), which comprises a light-transparent window (603) in a first wavelength range, wherein in the light-transparent window (603) a security feature (605) is formed, which is readable in a second wavelength range ,

10. Document reader (300) for reading out a security feature (107) of a document (100), wherein the document (100) has a first document page (101) with a light transparent window (103) and a second document page (105) with the security feature (107 ), wherein the security feature (107) is arranged in a predetermined area, wherein the position of the predetermined area on the second document page (105) corresponds to the position of the light transparent window (103) of the first document page (101), so that upon merging the first document page (101) and the second document page (105) the security feature (107) through the light transparent window (103) is readable, and wherein the document reading device (300) comprises the following features: an image pickup device (301) for optically detecting the light transparent window (103) to obtain an image with the security feature (107); and a processor (303) for detecting the security feature (107) based on the image.

1 1. The document reader (300) of claim 10, wherein the processor (303) is adapted to determine a position of the light transparent window (103) in the image and to detect the security feature (107) at the determined position of the light transparent window (103).

The document reader (300) of claim 1 1, wherein the processor (303) is configured to detect a position of the light transparent window (103) in the image by detecting edges or a contour of the light transparent window (103).

13. Document reader (300) according to claim 10, 11 or 12, which further comprises a light source, in particular a white light source, an infrared light source or an ultraviolet light source, which is designed to illuminate the security feature (107) through the light transparent window (103) ,

14. The document reading device (300) according to any one of claims 10 to 13, wherein the image pickup device (301) is formed by an image camera or a scan line.

15. Method (500) for reading out a security feature (107) of a document (100), wherein the document (100) has a first document page (101) with a light-transparent window (103) and a second document page (105) with the security feature (107 ), wherein the security feature (107) is arranged in a predetermined area, wherein the position of the predetermined area on the second document page (105) corresponds to the position of the light transparent window (103) of the first document page (101), so that upon merging the first document page (101) and the second document page (105) the security feature (107) through the light transparent window (103) is readable, and wherein the method comprises the following features: optically detecting (501) the light transparent window (103) to obtain an image with the security feature (107); and

Detecting (503) the security feature (107) based on the image.