Abstract:
A physical object is provided that comprises a base medium (12), such as a paper sheet, and a memory tag (5) embedded in it or attached to it. The memory tag (5) stores at least one measure/location data pair comprising a measurement of a location-dependent characteristic of the base medium (12) originally associated with the tag, and a location in or on the object where the measurement was made. Preferably the measure/location data pair is digitally signed and stored in encrypted form. By checking whether the measure included in the stored data pair matches a current measure of the base medium (12) at the indicated location, it is possible to check whether the base medium is the original medium. Apparatus is provided for originally writing the data pair to the memory tag; apparatus is also provided for subsequently using the data pair for carrying out the checking operation.
Abstract:
PROBLEM TO BE SOLVED: To provide RF powder particles, RF powder, and a substrate containing the RF powder, which make it difficult to produce forged documents, forged bank notes, etc. with respect to sheet-like objects having high property value such as bank notes and allow required information to be stored respectively in many particles each of which is provided with one tank circuit having a prescribed resonance frequency. SOLUTION: An RF powder particle has a coil 24 (inductance element) as a magnetic field coupling element and a capacitor 25 (capacitance element) connected to both ends of the coil, formed on an insulating surface of a substrate 22 and is configured so as to form a tank circuit 31 by the inductance element and the capacitance element. The tank circuit 31 functions as a circuit in a resonance state or a circuit in a non-resonance circuit in accordance with a condition in response to a high-frequency magnetic field given from the outside. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an RF powder adding method and an RF powder added base sheet to which RF powder is added, making it extremely difficult to produce fake cards, documents, bills, or the like regarding sheet-like objects with high asset values such as various cards, bills and securities. SOLUTION: The RF powder adding method is provided for adding RF powder to the base sheet 10 by arranging RF powder containing multiple RF powder particles 11 having magnetic field coupling circuit elements in the high frequency magnetic field of specific frequency, on the surface of the base sheet 10. The RF powder is arranged on the surface of the base sheet by a printing method. The RF powder added base sheet 10 is formed by arranging the RF powder containing the multiple RF powder particles 11 having the magnetic field coupling circuit elements in the high frequency magnetic field of specific frequency, on the surface of the base sheet in a state of being included in printed notation. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a function for checking whether an IC card is altered, especially easily check whether a description content on a front surface is replaced. SOLUTION: The IC card for describing record information such as personal information and having an optical change element image on a side of the front surface, stores characteristic information of the optical change element image together with the record information of such as the personal information in a memory inside. In addition, authenticity is determined by comparing the characteristic information of the optical change element image placed on a card front surface and the characteristic information stored in the memory in the inside of the IC card, and access to other stored information in the inside of the memory is permitted.