| US5672410A              (en)* | 1992-05-11 | 1997-09-30 | Avery Dennison Corporation | Embossed metallic leafing pigments | 
| US5325167A              (en)* | 1992-05-11 | 1994-06-28 | Canon Research Center America, Inc. | Record document authentication by microscopic grain structure and method | 
| GB9618163D0              (en)* | 1996-08-30 | 1996-10-09 | Omni Media Network Internation | Authentication card or tag | 
| US5825475A              (en)* | 1997-07-29 | 1998-10-20 | Van Leer Metallized Products (Usa) Limited | System and method for determining which of a plurality of visually indistinguishable objects have been marked with a covert indicator | 
| NL1008097C2              (en)* | 1998-01-22 | 1999-07-26 | Unicate Software Management N | Method and system for identifying one or more objects. | 
| DE19926689A1              (en) | 1999-06-11 | 2000-12-14 | Hsm Gmbh | Optical authenticity feature | 
| SK135299A3              (en)* | 1999-10-01 | 2002-02-05 | Ivan Kocis | Document, method for the preparation thereof and device for authentification and an evidence of registered unique of said document | 
| LU90580B1              (en)* | 2000-05-08 | 2001-11-09 | Europ Economic Community | Method of identifying an object | 
| US8171567B1              (en) | 2002-09-04 | 2012-05-01 | Tracer Detection Technology Corp. | Authentication method and system | 
| FR2849245B1              (en)* | 2002-12-20 | 2006-02-24 | Thales Sa | METHOD FOR AUTHENTICATION AND OPTICAL IDENTIFICATION OF OBJECTS AND DEVICE FOR IMPLEMENTING THE SAME | 
| GB0300555D0              (en)* | 2003-01-10 | 2003-02-12 | Durand Technology Ltd | Improvements in or relating to security or authentication markings or the like | 
| GB0306058D0              (en)* | 2003-03-17 | 2003-04-23 | Microsharp Corp Ltd | Optically coded security markings | 
| US7192208B2              (en) | 2003-09-02 | 2007-03-20 | Futurelogic, Inc. | Rewritable card printer | 
| US7494414B2              (en) | 2003-09-12 | 2009-02-24 | Igt | Gaming device having a card management system for the management of circulating data cards | 
| US8057296B2              (en) | 2003-09-12 | 2011-11-15 | Igt | Gaming device including a card processing assembly having vertically-stacked card holders operable with thermally-printable data cards and portable card changeover machines | 
| WO2005048256A2              (en)* | 2003-11-14 | 2005-05-26 | Koninklijke Philips Electronics N.V. | A data carrier having security mark and apparatus for handling such data carrier. | 
| CN1922679A              (en)* | 2004-02-24 | 2007-02-28 | 皇家飞利浦电子股份有限公司 | Speckle pattern for authenticating an information carrier | 
| EP1730675B1              (en) | 2004-03-12 | 2015-05-20 | Ingenia Holdings Limited | Authenticity verification methods, products and apparatuses | 
| GB2417707B              (en)* | 2004-08-13 | 2006-07-26 | Ingenia Technology Ltd | Methods and apparatuses for creating authenticatable printed articles and subsequently verifying them | 
| JP5148996B2              (en) | 2004-03-12 | 2013-02-20 | インジェニア・テクノロジー・(ユーケイ)・リミテッド | Method and apparatus for creating and subsequently verifying authentic printed articles | 
| GB2417592B              (en) | 2004-08-13 | 2006-07-26 | Ingenia Technology Ltd | Authenticity verification of articles | 
| CN101006477A              (en)* | 2004-08-23 | 2007-07-25 | 皇家飞利浦电子股份有限公司 | Position and orientation detection for an optical identifier | 
| JP2008524689A              (en) | 2004-12-17 | 2008-07-10 | コーニンクレッカ  フィリップス  エレクトロニクス  エヌ  ヴィ | Optical identifier with randomly oriented partial faces | 
| GB2426100B              (en)* | 2005-05-11 | 2007-08-22 | Ingenia Technology Ltd | Authenticity vertification | 
| EP1908028A1              (en)* | 2005-07-27 | 2008-04-09 | Ingenia Technology Limited | Authenticity verification | 
| JP5123181B2              (en)* | 2005-07-27 | 2013-01-16 | インジェニア・テクノロジー・(ユーケイ)・リミテッド | Authenticity verification | 
| RU2008107316A              (en)* | 2005-07-27 | 2009-09-10 | Инджениа Текнолоджи Лимитед (Gb) | CHECKING THE PRODUCT SIGNATURE CREATED ON THE BASIS OF THE SIGNALS RECEIVED THROUGH THE SCATTERING OF THE COherent OPTICAL RADIATION FROM THE PRODUCT SURFACE | 
| US9208394B2              (en) | 2005-09-05 | 2015-12-08 | Alpvision S.A. | Authentication of an article of manufacture using an image of the microstructure of it surface | 
| EP2960830B1              (en) | 2005-09-05 | 2018-07-04 | Alpvision SA | Means for using microstructure of materials surface as a unique identifier | 
| GB2429950B              (en)* | 2005-09-08 | 2007-08-22 | Ingenia Holdings | Copying | 
| CN101923647B              (en) | 2005-12-23 | 2013-01-09 | 英根亚控股有限公司 | Optical authentication | 
| GB2434442A              (en)* | 2006-01-16 | 2007-07-25 | Ingenia Holdings | Verification of performance attributes of packaged integrated circuits | 
| GB0605360D0              (en) | 2006-03-16 | 2006-04-26 | Dupont Teijin Films Us Ltd | Method of manufacture | 
| US12094286B2              (en) | 2006-09-05 | 2024-09-17 | Alpvision S.A. | Means for using microstructure of materials surface as a unique identifier | 
| JP4848912B2              (en)* | 2006-09-28 | 2011-12-28 | 富士ゼロックス株式会社 | Authenticity determination apparatus, authenticity determination method, authenticity determination program, and method for producing amorphous alloy member | 
| EP1990212A1              (en) | 2007-05-07 | 2008-11-12 | CSEM Centre Suisse d'Electronique et de Microtechnique SA Recherche et Développement | Unique security device for the identification or authentication of valuable goods, fabrication process and method for securing valuable goods using such a unique security device | 
| EP1990779B1              (en) | 2007-05-07 | 2016-09-14 | CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et Développement | Security device for the identification or authentication of goods and method for securing goods using such a security device | 
| US8197334B2              (en) | 2007-10-29 | 2012-06-12 | Igt | Circulating data card apparatus and management system | 
| GB2460625B              (en)* | 2008-05-14 | 2010-05-26 | Ingenia Holdings | Two tier authentication | 
| US8781153B2              (en)* | 2008-06-05 | 2014-07-15 | New York University | Method, system, and computer-accessible medium for authentication of paper using a speckle pattern | 
| GB2461971B              (en)* | 2008-07-11 | 2012-12-26 | Ingenia Holdings Ltd | Generating a collective signature for articles produced in a mould | 
| GB2462059A              (en)* | 2008-07-11 | 2010-01-27 | Ingenia Holdings | Authentication scanner | 
| GB2466311B              (en) | 2008-12-19 | 2010-11-03 | Ingenia Holdings | Self-calibration of a matching algorithm for determining authenticity | 
| DE102009017986A1              (en)* | 2009-04-21 | 2010-10-28 | Beb Industrie-Elektronik Ag | Device and method for the feature recognition of notes of value | 
| GB2476226B              (en) | 2009-11-10 | 2012-03-28 | Ingenia Holdings Ltd | Optimisation | 
| EP2333749B1              (en)* | 2009-12-10 | 2013-10-16 | Universität Bayreuth | Artificial fingerprint | 
| WO2011077459A2              (en)* | 2009-12-23 | 2011-06-30 | Alexia Technologies Private Limited | A method of extracting naturally encrypted features from a natural surface of a product | 
| WO2012122609A2              (en)* | 2011-03-15 | 2012-09-20 | Universite De Mons | Labelling system | 
| US20150169928A1              (en) | 2012-03-01 | 2015-06-18 | Sys-Tech Solutions, Inc. | Methods and a system for verifying the identity of a printed item | 
| RS57033B1              (en) | 2012-03-01 | 2018-05-31 | Sys Tech Solutions Inc | Unique identification information from marked features | 
| US20150379321A1              (en) | 2012-03-01 | 2015-12-31 | Sys-Tech Solutions, Inc. | Methods and a system for verifying the authenticity of a mark | 
| JP5991465B2              (en)* | 2012-04-27 | 2016-09-14 | 住友電工焼結合金株式会社 | Individual identification method for sintered products | 
| US9940572B2              (en) | 2015-02-17 | 2018-04-10 | Sys-Tech Solutions, Inc. | Methods and a computing device for determining whether a mark is genuine | 
| EP3937080A1              (en) | 2015-06-16 | 2022-01-12 | SYS-Tech Solutions, Inc. | Methods and a computer device for determining whether a mark is geniune | 
| IL240872A              (en) | 2015-08-27 | 2016-11-30 | Elbit Systems Land & C4I Ltd | System and method for object authenticity detection | 
| CN106682912B              (en) | 2015-11-10 | 2021-06-15 | 艾普维真股份有限公司 | Authentication method of 3D structure | 
| BR112018068471A2              (en) | 2016-03-14 | 2019-01-22 | Sys Tech Solutions Inc | method to determine if a candidate brand is genuine, and computing device. |