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    Magnetic PUF with predetermined information layer
    3.
    发明授权
    Magnetic PUF with predetermined information layer 有权

    公开(公告)号：US11951759B2

    公开(公告)日：2024-04-09

    申请号：US17902779

    申请日：2022-09-02

    申请人： Lexmark International, Inc.

    发明人： Keith Bryan Hardin

    IPC分类号： B42D25/45 ,  B42D25/369 ,  B42D25/373 ,  G06K19/06 ,  G06K19/08

    CPC分类号： B42D25/369 ,  B42D25/373 ,  B42D25/45

    摘要： The invention adds a Physical Information Layer (“PIL”) to the magnetic particles within a matrix that creates an unclonable physical unclonable function “object.” The PIL assists in searching to find the combination that matches a pre-determined enrolled combination with additional information that includes a search index, which limits the range of data required to search in order to find a match in the enrolled database. The index could be a predetermined value that associates the random magnetic profile values to a list of enrolled values in a database. The additional information may include product or general information that needs to be easily communicated to a user of the PUF.

    MULTIFUNCTION SECURITY ELEMENT
    7.
    发明申请
    MULTIFUNCTION SECURITY ELEMENT 有权

    公开(公告)号：US20230121024A1

    公开(公告)日：2023-04-20

    申请号：US17596406

    申请日：2020-06-30

    申请人： FASE S.R.L.

    发明人： Orazio AUDINO ,  Francesco BERARDI ,  Geremino CAMMISA ,  Luca CIMATTI

    IPC分类号： B42D25/328 ,  B42D25/351 ,  B42D25/373 ,  B42D25/387 ,  B42D25/445 ,  B42D25/364 ,  B42D25/369 ,  B42D25/47

    摘要： A security element includes a first transparent film, on which a holographic layer is formed having a holographic surface structure, a reflective layer arranged in contact with the holographic layer having a pattern of non-transparent regions and transparent regions, a color changing layer, and a photoactive layer having dark regions and transparent regions. In first regions, parts of the non-transparent regions of the reflective layer are not overlapped by the dark regions of the photoactive layer. In second regions, the color changing layer is backed by the dark regions of the photoactive layer. In third regions, the transparent regions of the photoactive layer are at least partly in register with the transparent regions of the reflective layer so that the third regions are continuous when passing from patterns outside the non-transparent regions of the reflective layer to patterns outside the dark regions of the photoactive layer.

    METHOD FOR PRODUCING AN ELECTRONIC DOCUMENT COMPRISING A CONCEALED MAGNETIC STRIP, AND ELECTRONIC DOCUMENT THEREBY OBTAINED
    10.
    发明申请
    METHOD FOR PRODUCING AN ELECTRONIC DOCUMENT COMPRISING A CONCEALED MAGNETIC STRIP, AND ELECTRONIC DOCUMENT THEREBY OBTAINED 有权

    公开(公告)号：US20230020171A1

    公开(公告)日：2023-01-19

    申请号：US17757415

    申请日：2020-12-16

    申请人： Idemia France

    发明人： Denis GUERARD ,  Jean-François BOSCHET

    IPC分类号： B42D25/369 ,  B41M3/14

    摘要： A method for producing an electronic document (30) comprising a concealed magnetic strip, comprising a step (22) of providing a surface (310) of an electronic document body (30), a step (23) of applying of a magnetic strip (33) to at least part of the surface (310) of the electronic document body (30), a visible surface (34), formed by the surface (310) of the body covered at least in part by the magnetic strip (33), having a Delta E contrast equal to or less than 15, and a step (24, 25, 26) of applying a decor (32) that covers the surface (310) of the body over the magnetic strip (33), the decor (32) having a thickness of at most 10 μm and having an opacity ratio at wavelengths in the visible domain of at least 70%; and a corresponding electronic document (30).