Photographic identification document

A photographic identification document (10) comprises a photograph (12) and a printed region (11). A first digital watermark is steganographically encoded in the photograph (12), the digital watermark conveying first information that can later be decoded and used to authenticate the document (10). I...

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Bibliographische Detailangaben
Hauptverfasser:	PERRY, BURT W, RHOADS, GEOFFREY B, CARR, JONATHAN SCOTT
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BOOK COVERS BOOKBINDING CALCULATING CHECKING-DEVICES COIN-FREED OR LIKE APPARATUS COLOUR PRINTING COMPUTING COUNTING DATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FORADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORYOR FORECASTING PURPOSES DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDEDFOR ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY FILES HANDLING OF COINS OR OF PAPER CURRENCY OR SIMILAR VALUABLEPAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING,DISPENSING, CHANGING OR DEPOSITING HANDLING RECORD CARRIERS IMAGE DATA PROCESSING OR GENERATION, IN GENERAL LINING MACHINES LOOSE LEAVES MOVABLE-STRIP WRITING OR READING APPARATUS PERFORMING OPERATIONS PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION PRESENTATION OF DATA PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITYFEATURES PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOTOTHERWISE PROVIDED FOR PRINTING PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES RECOGNITION OF DATA RECORD CARRIERS SPECIAL PRINTED MATTER STAMPS SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE,COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTINGPURPOSES, NOT OTHERWISE PROVIDED FOR TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	A photographic identification document (10) comprises a photograph (12) and a printed region (11). A first digital watermark is steganographically encoded in the photograph (12), the digital watermark conveying first information that can later be decoded and used to authenticate the document (10). In addition, a second digital watermark is steganographically encoded in the printed region (11) of the document (10), the second digital watermark conveying second information whose contents have an expected correspondence with contents of said first information, wherein said first and second information can be decoded and checked for said expected correspondence to aid in determining whether said photograph (12) or said printed region (11) has been fraudulently altered.