WO2004084418A3 - Method of providing a covert security feature - Google Patents

Method of providing a covert security feature Download PDF

Info

Publication number
WO2004084418A3
WO2004084418A3 PCT/GB2004/001173 GB2004001173W WO2004084418A3 WO 2004084418 A3 WO2004084418 A3 WO 2004084418A3 GB 2004001173 W GB2004001173 W GB 2004001173W WO 2004084418 A3 WO2004084418 A3 WO 2004084418A3
Authority
WO
WIPO (PCT)
Prior art keywords
security feature
indicia
providing
substrate
elements
Prior art date
Application number
PCT/GB2004/001173
Other languages
French (fr)
Other versions
WO2004084418A2 (en
Inventor
David Hilton
Weichao Tan
Anita Barthram
Original Assignee
Rue De Int Ltd
David Hilton
Weichao Tan
Anita Barthram
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rue De Int Ltd, David Hilton, Weichao Tan, Anita Barthram filed Critical Rue De Int Ltd
Publication of WO2004084418A2 publication Critical patent/WO2004084418A2/en
Publication of WO2004084418A3 publication Critical patent/WO2004084418A3/en

Links

Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/004—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using digital security elements, e.g. information coded on a magnetic thread or strip
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/20—Testing patterns thereon
    • G07D7/202—Testing patterns thereon using pattern matching
    • G07D7/2041—Matching statistical distributions, e.g. of particle sizes orientations

Abstract

A method of providing a covert security feature on an article. The method comprises generating data defining indicia to be provided on a substrate of the article, the indicia comprising a plurality of elements, wherein the data defines a security feature constituted by a characteristic of the elements which varies in a predetermined manner. Providing the indicia on a substrate of the article using a marking material and in accordance with the data, wherein the providing step causes the characteristics of the elements to vary so that the security feature cannot be determined from a visual inspection of the indicia on the substrate but the presence of the security feature can be deduced following a statistical analysis of the variation in the said characteristic of the elements of the indicia on the substrate using the predetermined manner in which the security feature was defined.
PCT/GB2004/001173 2003-03-21 2004-03-18 Method of providing a covert security feature WO2004084418A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0306578.6 2003-03-21
GBGB0306578.6A GB0306578D0 (en) 2003-03-21 2003-03-21 Method of providing a covert security feature

Publications (2)

Publication Number Publication Date
WO2004084418A2 WO2004084418A2 (en) 2004-09-30
WO2004084418A3 true WO2004084418A3 (en) 2005-02-10

Family

ID=9955288

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2004/001173 WO2004084418A2 (en) 2003-03-21 2004-03-18 Method of providing a covert security feature

Country Status (2)

Country Link
GB (1) GB0306578D0 (en)
WO (1) WO2004084418A2 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5193853A (en) * 1989-01-18 1993-03-16 Wicker Ralph C Nonreplicable document and method for making same
US5629770A (en) * 1993-12-20 1997-05-13 Lucent Technologies Inc. Document copying deterrent method using line and word shift techniques
US5710834A (en) * 1995-05-08 1998-01-20 Digimarc Corporation Method and apparatus responsive to a code signal conveyed through a graphic image
WO2000007356A2 (en) * 1998-07-31 2000-02-10 Digimarc Corporation Digital watermarks and methods for security documents
US6104812A (en) * 1998-01-12 2000-08-15 Juratrade, Limited Anti-counterfeiting method and apparatus using digital screening
WO2001086579A2 (en) * 2000-05-08 2001-11-15 Digimarc Corporation Envelopes and printed documents employing digital watermarks
US20030026452A1 (en) * 1995-05-08 2003-02-06 Rhoads Geoffrey B. Methods and systems for watermark processing of line art images

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5193853A (en) * 1989-01-18 1993-03-16 Wicker Ralph C Nonreplicable document and method for making same
US5629770A (en) * 1993-12-20 1997-05-13 Lucent Technologies Inc. Document copying deterrent method using line and word shift techniques
US5710834A (en) * 1995-05-08 1998-01-20 Digimarc Corporation Method and apparatus responsive to a code signal conveyed through a graphic image
US20030026452A1 (en) * 1995-05-08 2003-02-06 Rhoads Geoffrey B. Methods and systems for watermark processing of line art images
US6104812A (en) * 1998-01-12 2000-08-15 Juratrade, Limited Anti-counterfeiting method and apparatus using digital screening
WO2000007356A2 (en) * 1998-07-31 2000-02-10 Digimarc Corporation Digital watermarks and methods for security documents
WO2001086579A2 (en) * 2000-05-08 2001-11-15 Digimarc Corporation Envelopes and printed documents employing digital watermarks

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MAURICE MAES: "Twin Peaks: The Histogram Attack to Fixed Depth Image Watermarks", LCNS, vol. 1525, April 1998 (1998-04-01), pages 290 - 305, XP002307669, ISSN: 0302-9743, Retrieved from the Internet <URL:http://www.springerlink.com/index/15RVG9Q947PHTV9V.pdf> [retrieved on 20041124] *

Also Published As

Publication number Publication date
WO2004084418A2 (en) 2004-09-30
GB0306578D0 (en) 2003-04-30

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