A secure instrument including at least one porous polymer substrate including at least one porous polymer, or a substrate and at least one porous polymer layer or coating including at least one porous polymer, said at least one porous polymer layer or coating disposed on the substrate, where the at least one porous polymer substrate, layer, or coating has pores or channels sized to permit water to enter the pores or channels, and sized to prevent one or more viruses or bacteria from entering the pores or channels.

A secure instrument including at least one porous polymer substrate including at least one porous polymer, or a substrate and at least one porous polymer layer or coating including at least one porous polymer, said at least one porous polymer layer or coating disposed on the substrate, where the at least one porous polymer substrate, layer, or coating has pores or channels sized to permit water to enter the pores or channels, and sized to prevent one or more viruses or bacteria from entering the pores or channels.

An optical anti-counterfeiting element and manufacturing methods of the optical anti-counterfeiting element are provided. The optical anti-counterfeiting element includes an undulating structure layer provided with a first area, a second area and a third area; the first area has a first microstructure; the second area has a second microstructure; the third area is an unstructured flat area; a specific volume of the second microstructure is greater than a specific volume of the first microstructure; the first area and the third area are respectively provided with a reflecting layer, a dielectric layer and an absorbing layer which are overlapped, and the second area is not provided with a reflecting layer; and a surface appearance of one side, far away from the undulating structure layer, of the dielectric layer of the first area is obviously different from a surface appearance of the undulating structure layer.

A method and system for writing a label (defined within a predetermined region of the sample 110), the label displaying a visible layout of light-modified regions in a predetermined spatial arrangement. The method comprises: modifying regions of a material within the label using light, wherein the modifying comprises using light of a first polarisation state to provide photo-induced optically active regions of a first type having a first optical activity state which is characteristic of having been formed by light of the first polarisation state, in order to encode covert information in the label using the locations of the first type of light-modified regions within the spatial arrangement of the label.

The present invention disclosed a shaped object comprising nano cellulose alone or a composition of nano cellulose for inclusion in a paper product and process for preparation thereof. The present invention further disclosed a paper product having the shaped objects incorporated therein. The shaped objects are used as a security feature for identifying and authenticating security documents.

The present invention disclosed a shaped object comprising nano cellulose alone or a composition of nano cellulose for inclusion in a paper product and process for preparation thereof. The present invention further disclosed a paper product having the shaped objects incorporated therein. The shaped objects are used as a security feature for identifying and authenticating security documents.

The present invention proposes a method for producing an authenticable moiré shape that simultaneously moves and shows a beating effect. The method relies on a combination of the 1D or the 2D moiré and the level line moiré. When tilting a compound showing such a moiré, the moiré shape moves, its intensity levels change significantly but its shape remains the same and is recognizable. Embodiments comprise a base layer made of patterned metallic tiny shapes and a revealing layer made of a 1D array of cylindrical lenslets or of a 2D array of spherical or aspherical lenslets.

The invention allows using a commodity hardware (e.g. a smartphone, a tablet, a computer . . . ) to automatically establish a high level of assurance authentication and identification of any government-issued identity document of a user (e.g. identity card, driving license, passport . . . ) and link that to digital identity counterpart. Moreover, the invention allows personalizing a material-based security feature provided of said government-issued identity document to create a link between the identity document and its data content that can be read by such a commodity hardware and serves as reliable credential for accessing a service once the material-based security feature has been authenticated via the commodity hardware and a signature of the identity data of the user has been authenticated by a server of an authority.

The present disclosure relates to compositions and methods for marking/tagging objects for identification. In particular, tagging objects with a nucleic acid taggant (genetic tag based merchandise authentication).

The present disclosure relates to compositions and methods for marking/tagging objects for identification. In particular, tagging objects with a nucleic acid taggant (genetic tag based merchandise authentication).