PHYSICAL SECURITY AND AUTHENTICATION SYSTEMS USING QUANTUM SIGNATURES

• Main Authors: KAR, Swastik, STEVENSON, Paul, BANSIL, Arun
• Format: Patent
• Language: English; French
• Published: 25.07.2024
• Subjects: ADHESIVES; BOOK COVERS; BOOKBINDING; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; CORRECTING FLUIDS; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDEDFOR; DYES; FILES; FILLING PASTES; INKS; LOOSE LEAVES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; MOVABLE-STRIP WRITING OR READING APPARATUS; NANOTECHNOLOGY; NATURAL RESINS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; PHYSICS; POLISHES; PREPARATION OF CARBON BLACK; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITYFEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOTOTHERWISE PROVIDED FOR; SPECIAL PRINTED MATTER; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; TESTING; TRANSPORTING; TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES; USE OF MATERIALS THEREFOR; WOODSTAINS

Physical identification tags are provided that contain patterns of magnetized and non-magnetized nanoparticles embedded in a matrix. The magnetic nanoparticles form a spatially unique magnetic field distribution that is detectable only with the use of a quantum scanning magnetometer with nanometer resolution. The invisible magnetic field pattern is randomly generated by the mixture of magnetic with nonmagnetic nanoparticles and is physically impossible to reproduce. The tags can be used for identification and authentication of articles of commerce, artworks, and subjects. L'invention concerne des étiquettes d'identification physique qui contiennent des motifs de nanoparticules magnétisées et non magnétisées incorporées dans une matrice. Les nanoparticules magnétiques forment une distribution de champ magnétique spatialement unique qui est détectable uniquement à l'aide d'un magnétomètre à balayage quantique ayant une résolution nanométrique. Le motif de champ magnétique invisible est généré de manière aléatoire par le mélange de nanoparticules magnétiques avec des nanoparticules non magnétiques et est physiquement impossible à reproduire. Les étiquettes peuvent être utilisées pour l'identification et l'authentification d'articles de commerce, d'oeuvres d'art et de sujets.