A visual-information security system that includes an information security label positioned to conceal visual information on a substrate. The information security label may include a spiral-shaped cut (or other complex shape) within the body of the label and a pull-tab, such that when a user pulls on the tab, the label peels off of the substrate in a spiral pattern, revealing the information concealed beneath the label. The complex-shaped cut makes reapplication of the label difficult and evident, thus providing security to consumers. The label may include multiple layers of material, for example, a peel-off layer and an adhesive layer.

A hologram detection method according to an aspect of the disclosure, includes: inputting a first image, obtained by capturing a detection object on the basis of first flash intensity, to a neural network model to obtain a first detection result value representing the detection or not of a hologram for each of predetermined at least one detection unit regions; and comparing a threshold value with the first detection result value obtained for each detection unit region to determine the detection or not of a hologram in the first image and a first detection unit region where a hologram is detected.

The present disclosure discloses an anti-counterfeit environment-friendly packaging material. The packaging material comprises an environment-friendly multilayer polymeric composite; and at least one iridescent non-metallic holographic stereogram in or on at least one layer of said environment-friendly multilayer polymeric composite. Also disclosed is a process for preparing an anti-counterfeit environment-friendly packaging material. The present disclosure further provides an anti-counterfeit reclosable package comprising the environment-friendly multilayer polymeric composite.

The present disclosure discloses an anti-counterfeit environment-friendly packaging material. The packaging material comprises an environment-friendly multilayer polymeric composite; and at least one iridescent non-metallic holographic stereogram in or on at least one layer of said environment-friendly multilayer polymeric composite. Also disclosed is a process for preparing an anti-counterfeit environment-friendly packaging material. The present disclosure further provides an anti-counterfeit reclosable package comprising the environment-friendly multilayer polymeric composite.

A security element, called a security dome, intended to be glued onto an electronic board. The security element includes at least: a metal part intended to be in contact with at least one electrical circuit of the electronic board; and a protective part covering the metal part and having a first face comprising an adhesive portion intended to ensure the gluing of the security element on the electronic board by an automatic assembly method having at least one reflow step. The metal part and protective part are resistant to temperatures used during the reflow step.

A security element, called a security dome, intended to be glued onto an electronic board. The security element includes at least: a metal part intended to be in contact with at least one electrical circuit of the electronic board; and a protective part covering the metal part and having a first face comprising an adhesive portion intended to ensure the gluing of the security element on the electronic board by an automatic assembly method having at least one reflow step. The metal part and protective part are resistant to temperatures used during the reflow step.

A display element includes a plurality of display areas, each display area including a plurality of sub display areas, each sub display area including a plurality of cells. A boundary portion formed into a groove structure so as to surround the cells. A plurality of prism structures each having a triangular cross section are arranged in parallel to each other in the cells so as to extend linearly or in an arc, and the boundary portion includes a rib structure connected to both ends of one or more of the prism structures. A display area is to display different motifs, in response to one or more of the sub display areas changing an optical property to become reflective or transmissive in accordance with one or both of an orientation angle and an elevation angle of observation.

A display element includes a plurality of display areas, each display area including a plurality of sub display areas, each sub display area including a plurality of cells. A boundary portion formed into a groove structure so as to surround the cells. A plurality of prism structures each having a triangular cross section are arranged in parallel to each other in the cells so as to extend linearly or in an arc, and the boundary portion includes a rib structure connected to both ends of one or more of the prism structures. A display area is to display different motifs, in response to one or more of the sub display areas changing an optical property to become reflective or transmissive in accordance with one or both of an orientation angle and an elevation angle of observation.

A hologram detection method according to an aspect of the disclosure, includes: inputting a first image, obtained by capturing a detection object on the basis of first flash intensity, to a neural network model to obtain a first detection result value representing the detection or not of a hologram for each of predetermined at least one detection unit regions; and comparing a threshold value with the first detection result value obtained for each detection unit region to determine the detection or not of a hologram in the first image and a first detection unit region where a hologram is detected.

The invention relates to the field of the protection of security documents such as for example banknotes and identity documents against counterfeit and illegal reproduction. In particular, the invention relates to optical effect layers (OEL) showing a viewing-angle dependent optical effect, devices and processes for producing said OEL and items carrying said OEL, as well as uses of said optical effect layers as an anti-counterfeit means on documents. The OEL comprises a plurality of non-spherical magnetic or magnetizable particles, which are dispersed in a coating composition comprising a binder material, the OEL comprising two or more loop-shaped areas, being nested around a common central area that is surrounded by the innermost loop-shaped area, wherein, in each of the loop-shaped areas, at least a part of the plurality of non-spherical magnetic or magnetizable particles are oriented such that, in a cross-section perpendicular to the OEL layer and extending from the center of the central area to the outer boundary of the outermost loop-shaped area, the longest axis of the particles in each of the cross-sectional areas of the looped-shaped areas follow a tangent of either a negatively curved or a positively curved part of hypothetical ellipses or circles.