A micro-optic security device with zonal color transitions includes a planar array of focusing elements, an image icon layer including a plurality of retaining structures, the plurality of retaining structures defining isolated volumes at a first depth within the image icon layer, a first zone of image icons, the first zone of image icons having a first predefined subset of the plurality of retaining structures, wherein the isolated volumes of retaining structures of the first predefined subset of the plurality of retaining structures contain cured pigmented material of a first color, and a second zone of image icons, the second zone of image icons including a second predefined subset of the plurality of retaining structures, wherein the isolated volumes of retaining structures of the second predefined subset of the plurality of retaining structures contain cured pigmented material of a second color, wherein the second color contrasts with the first color.

A computer-implemented method, system and computer program product for verifying a user meets identification (ID) requirements for an associated activity or event. A request for a set of digital ID documents to be provided to the computing device of the verifier by the computing device of the device holder is detected. A response to the request is then detected which provides only a subset of the requested digital ID documents. Alternative digital ID document(s) are then identified to replace the digital ID document(s) that were requested but not provided by the device holder. An instruction is then issued to the computing device of the verifier to request one or more of the identified alternative digital ID documents from the computing device of the device holder in order to complete the verification process in determining if the device holder meets the ID requirements for an associated activity or event.

A computer-implemented method, system and computer program product for verifying a user meets identification (ID) requirements for an associated activity or event. A request for a set of digital ID documents to be provided to the computing device of the verifier by the computing device of the device holder is detected. A response to the request is then detected which provides only a subset of the requested digital ID documents. Alternative digital ID document(s) are then identified to replace the digital ID document(s) that were requested but not provided by the device holder. An instruction is then issued to the computing device of the verifier to request one or more of the identified alternative digital ID documents from the computing device of the device holder in order to complete the verification process in determining if the device holder meets the ID requirements for an associated activity or event.

A system and associated method, the system including an item including a porous polymer layer including a polymer material capable of absorbing a liquid, the polymer material having an index of refraction that is the same or substantially the same as an index of refraction of the liquid, and a substrate layer, where the porous polymer layer is disposed on the substrate layer, and a liquid source comprising the liquid, where the porous polymer layer appears transparent in response to absorption of the liquid from the liquid source by the porous polymer layer.

Methods and apparatus for invisible luminescent protection for financial and identification documents are described herein. An example apparatus includes an illuminating source to illuminate a sample with light having a first wavelength, a photo element to detect light having a second wavelength and to capture an image of a first pattern printed on the sample, wherein the first pattern is printed on a first area of the sample with clear ink containing inorganic, ceramic particles having a mean diameter of less than one micron and having luminescent properties such that when the particles are illuminated with light having the first wavelength, they emit light having the second wavelength.

Methods and apparatus for invisible luminescent protection for financial and identification documents are described herein. An example apparatus includes an illuminating source to illuminate a sample with light having a first wavelength, a photo element to detect light having a second wavelength and to capture an image of a first pattern printed on the sample, wherein the first pattern is printed on a first area of the sample with clear ink containing inorganic, ceramic particles having a mean diameter of less than one micron and having luminescent properties such that when the particles are illuminated with light having the first wavelength, they emit light having the second wavelength.

The present invention relates to a method for authenticating a document comprising at least one line of anti-counterfeit patterns spaced from each other, the positions of the anti-counterfeit patterns being random, and a partial anti-counterfeit pattern being provided at an edge line of said document, the method comprising the following steps of:

receiving a digital image of said document, said digital image comprising said partial anti-counterfeit pattern in a first edge area corresponding to said edge line;

selecting said first edge area;

copy-pasting said first edge area adjacent to a second edge area of the digital image to generate a combined digital image, said second edge area being opposite to said first edge area, wherein content, which is comprised in said second edge area and located on the same line as said partial anti-counterfeit pattern, and said partial anti-counterfeit pattern jointly form a combined pattern;

authenticating said document by taking into account said combined pattern.

Described is a chiral liquid crystal polymer (CLCP) layer or pattern which comprises randomly distributed craters of controlled mean diameter and/or density. The density and/or mean diameter of the craters can be controlled, for example, by adjusting the wetting of a substrate by a CLCP precursor composition, the development time of the precursor composition, and the thickness of the applied precursor composition.

Described is a chiral liquid crystal polymer (CLCP) layer or pattern which comprises randomly distributed craters of controlled mean diameter and/or density. The density and/or mean diameter of the craters can be controlled, for example, by adjusting the wetting of a substrate by a CLCP precursor composition, the development time of the precursor composition, and the thickness of the applied precursor composition.

A security device includes a plurality of diffractive surface elements arranged on a carrier element. A surface covered by the diffractive surface elements on the carrier element can occupy at least a partial region of the carrier element. Each individual diffractive surface element can have a three-dimensional surface structure. A portion of the plurality of the diffractive surface elements can form a first surface element group including the portion of the plurality of diffractive surface elements, and an orientation of the diffractive surface elements in the first surface element group can be matched to each other wherein together they make a single first image point of an associated first symbol to be represented visible to an observer under particular observation conditions.