Abstract: A computer-implemented method for training an artificial intelligence based neural network is provided. At least one digital image of at least one security document is provided as a reference. A set of digital training images is provided, wherein these are altered compared to the digital image of the security document. The set of digital training images includes a first subset of positive digital training images having a visual impact of an alteration such that an unbiased human observer would consider a reproduction of the respective digital training image to represent the security document or multiple security documents. The set of digital training images includes a second subset of negative digital training images. Ground truth is provided to the neural network as to whether a reproduction of the respective digital training image is to be considered representing the security document or multiple security documents or not.

Abstract: An anti-forgery security device comprises an optical waveguide, an out-coupler having first macroscopically repetitive elements and being arranged to couple out light from the waveguide, and a light processing structure comprising second macroscopically repetitive elements and being arranged to process light coupled out by said out-coupler. The first and second elements are arranged on opposite sides of the waveguide. The device generates e.g. Moire and/or parallax effects from light propagating along the waveguide. Third, absorbing elements may be added to generate effects without light in the waveguide.

Abstract: The carrier for representing a monetary value as a means of payment comprises a substrate, a control unit mounted to the substrate, a value store for storing a carrier value of the carrier, and an interface circuit for electronic communication of an external device with the control unit. The control unit is adapted and structured to modify the value store upon receipt of a request through said interface circuit. A large number of such carriers is used in a payment infrastructure having a plurality of terminal devices that are able to communicate with the carriers through their interface circuits. The infrastructure further comprises a central server device. Values can be transferred to and/or from individual carriers by various methods. A number of measures are described to protect the carriers and the rest of the infrastructure from tampering.

Abstract: The carrier for representing a monetary value as a means of payment comprises a substrate, a control unit mounted to the substrate, a value store for storing a carrier value of the carrier, a display device for displaying a status of the carrier and an interface circuit for electronic communication of an external device with the control unit. Further, an authentication device is provide for verifying the authenticity of the status shown by the display device. The authentication device e.g. comprises an optically variable device, a diffractive structure, an at least partially transparent structure, a grating, a Fresnel-lens, an optical polarizer, or a periodic structure. It is e.g. overlaid with or can be brought to overlay with the display device. It makes tampering with the display device more difficult.

Abstract: The carrier for representing a monetary value as a means of payment comprises a substrate, a control unit mounted to the substrate, a value store for storing a carrier value of the carrier. and an interface circuit for electronic communication of an external device with the control unit. The carrier further comprises an owner store for storing the current owner of the earner. the current owner can e.g. be displayed on a display device of the carrier, or it can be used for restricting certain privileged operations on the carrier to its current owner. A large number of such carriers is used in a payment infrastructure having a plurality of terminal devices that are able to communicate with the carriers through their interface circuits, The infrastructure further comprises a central server device, Values can be transferred to and/or from individual carriers by various methods. A number of measures are described to protect the carriers and the rest of the infrastructure horn tampering.

Abstract: In order to support the verification of a security document, the document is placed on a verification device having a touchscreen. A conductive structure embedded in the document is detected by the touchscreen and the position and orientation of a window in the document is calculated therefrom. The verification device then displays an image positioned and rotated to appear at the location of the window. The image may interact with the document to generate Moiré patterns, fluorescent images or animations.

Abstract: A security document includes a non-homogeneous region formed e.g. by a structure of bars that vary the document's thickness dielectric permittivity or electrical conductance. The structure is verified by placing the document on the capacitive touchscreen of a verification device. Then, the user moves a finger or pen along the structure, which gives rise to a varying capacitive signal in the verification device. The signal can then be analyzed for deriving information about the document.

Abstract: A method for producing an authenticity information item of a security element, which serves for checking the correct combination of carrier parts. The security element comprises at least one first partial element having a first partial information item and a second partial element having a second partial information item. The two partial elements are movable into a check position, in which the two partial elements overlay one another. The information items in the check position represent the information item. In an alignment step, the two partial elements are provided with at least one processing means, with which waves the first partial information item and the second partial information item are produced. One of the two partial elements is processed with the waves directly, and the other of the two partial elements is processed through the one partial element.

Abstract: A security device for verifying an authenticity of a security document comprises an at least partially transparent substrate with a first surface and a second surface. A first pattern is arranged on the first surface. A second pattern is arranged on said second surface. The first and the second pattern each comprise a plurality of pixels with at least three different gray levels visible from a macroscopic perspective. The first and second pattern cover only gray levels in a range between 20% black and 80% black, in particular between 35% black and 65% black. The first pattern is inverted with respect to the second pattern.

Abstract: The invention relates to a security element (1) with authentication information (2) for checking the correct combination of two support parts (3, 4, 5), characterized in that the security element (1) comprises at least one first partial element (6) comprising first partial information (7) and a second partial element (8) comprising second partial information (9). The first partial element (6) can be associated with a first support part (3) and the second partial element (8) can be associated with a second support part (4), both partial elements (6, 8) can be moved from a starting position into a checking position in which both partial elements (6, 8) overlap. The first partial information (7) and the second partial information (9) represent the authentication information (2) when in the checking position.

Abstract: The invention relates to a security element (1) with authentication information (2) for checking the correct combination of two support parts (3, 4, 5), characterized in that the security element (1) comprises at least one first partial element (6) comprising first partial information (7) and a second partial element (8) comprising second partial information (9). The first partial element (6) can be associated with a first support part (3) and the second partial element (8) can be associated with a second support part (4), both partial elements (6, 8) can be moved from a starting position into a checking position in which both partial elements (6, 8) overlap. The first partial information (7) and the second partial information (9) represent the authentication information (2) when in the checking position.

Abstract: A security device for verifying an authenticity of a security document comprises an at least partially transparent substrate with a first surface and a second surface. A first pattern is arranged on the first surface. This first pattern is derivable using a first seed pattern. A second pattern is arranged on said second surface. This second pattern is derivable using the first seed pattern and using a second seed pattern. Transmittances and reflectivities of the first and second patterns are selected such that in a reflection viewing mode, only the first seed pattern is visible. In a transmission viewing mode, however, only the second seed pattern is visible.

Abstract: A security device for verifying an authenticity of a security doc-ument comprises an at least partially transparent multilayer substrate with a first surface and a second surface. A first pattern is arranged on the first surface. This first pattern is derivable using a first seed pattern. A second pattern is arranged on the second surface. This second pattern is derivable using a second seed pattern. The security device furthermore comprises a third pattern arranged between a first and a second substrate layer. The third pattern is derivable using an inversion of the first pattern, an inversion of the second pattern, and a non-inverted third seed pattern. Transmit lances and reflectivities of the patterns are selected such that in a reflection viewing mode, only the first or second seed pattern is visible, respectively. In a transmission viewing mode, only the third seed pattern is visible.

Abstract: A method for producing an authenticity information item of a security element, which serves for checking the correct combination of carrier parts. The security element comprises at least one first partial element having a first partial information item and a second partial element having a second partial information item. The two partial elements are movable into a check position, in which the two partial elements overlay one another. The information items in the check position represent the information item. In an alignment step, the two partial elements are provided with at least one processing means, with which waves the first partial information item and the second partial information item are produced. One of the two partial elements is processed with the waves directly, and the other of the two partial elements is processed through the one partial element.

Abstract: The invention relates to a security element (1) with authentication information (2) for checking the correct combination of two support parts (3, 4, 5), characterized in that the security element (1) comprises at least one first partial element (6) comprising first partial information (7) and a second partial element (8) comprising second partial information ( 9). The first partial element (6) can be associated with a first support part (3) and the second partial element (8) can be associated with a second support part (4), both partial elements (6, 8) can be moved from a starting position into a checking position in which both partial elements (6, 8) overlap. The first partial information (7) and the second partial information (9) represent the authentication information (2) when in the checking position.

Abstract: A security device for verifying an authenticity of a security document comprises an at least partially transparent multilayer substrate with a first surface and a second surface. A first pattern is arranged on the first surface. This first pattern is derivable using a first seed pattern. A second pattern is arranged on the second surface. This second pattern is derivable using a second seed pattern. The security device furthermore comprises a third pattern arranged between a first and a second substrate layer. The third pattern is derivable using an inversion of the first pattern, an inversion of the second pattern, and a non-inverted third seed pattern. Transmit lances and reflectivities of the patterns are selected such that in a reflection viewing mode, only the first or second seed pattern is visible, respectively. In a transmission viewing mode, only the third seed pattern is visible.

Abstract: A security device for verifying an authenticity of a security document comprises an at least partially transparent substrate with a first surface and a second surface. A first pattern is arranged on the first surface. This first pattern is derivable using a first seed pattern. A second pattern is arranged on said second surface. This second pattern is derivable using the first seed pattern and using a second seed pattern. Transmittances and reflectivities of the first and second patterns are selected such that in a reflection viewing mode, only the first seed pattern is visible. In a transmission viewing mode, however, only the second seed pattern is visible.

Abstract: A security device for verifying an authenticity of a security document comprises an at least partially transparent substrate with a first surface and a second surface. A first pattern is arranged on the first surface. A second pattern is arranged on said second surface. The first and the second pattern each comprise a plurality of pixels with at least three different gray levels visible from a macroscopic perspective. The first and second pattern cover only gray levels in a range between 20% black and 80% black, in particular between 35% black and 65% black. The first pattern is inverted with respect to the second pattern.

Abstract: A new method of creating fluorescent color images visible under UV light is proposed, which relies on fluorescent colorants obtained by superposing fluorescent ink dots, on juxtaposed halftoning, and on mapping the gamut of the image to be reproduced into the gamut of the fluorescent colorants. The resulting color images are invisible under daylight and have, under UV light, a high resemblance with the original images. Applications comprises the protection of security documents and valuable articles, as well as publicity, fashion and night life, where fluorescent images viewed in the dark under UV illumination have a strongly appealing effect.

Abstract: The present invention relies on a band moiré image layout model capable of predicting the band moiré image layer layout produced when superposing a base band grating layer of a given layout and revealing line grating layer of a given layout. The base band grating layer, the revealing line grating layer and the resulting band moiré image layout may have a rectilinear or a curvilinear layout. Thanks to the band moiré image layout model, one can choose the layout of two layers selected from the set of base band grating layer, revealing line grating layer and band moiré image layer and obtain the layout of the third layer by computation, i.e. automatically. The presented methods may be used for creating an individualized protection for various categories of documents (banknotes, identity documents, checks, diploma, travel documents, tickets) and valuable products (optical disks, medical drugs, products with affixed labels, watches).