公开(公告)号：EP1825422A4

公开(公告)日：2009-07-01

申请号：EP05852851

申请日：2005-12-05

申请人： SCIENT GAMES INT INC

发明人： FINNERTY FRED W ,  STREETER GARY R ,  IRWIN KENNETH E

IPC分类号： G06F17/00 ,  G06K19/06 ,  G06K19/14 ,  G07D7/00 ,  G07D7/20

CPC分类号： B42D25/318 ,  A63F3/0685 ,  B42D25/00 ,  B42D2035/08 ,  B42D2035/34 ,  G06K7/143 ,  G06K19/06 ,  G06K19/06037 ,  G06K19/14 ,  G07D7/004 ,  G07D7/005 ,  G07D7/128 ,  G07D7/20

摘要： A method of embedding an optical signature in a document (20) and document produced therefrom. The optical signature is an optica pattern (22) generated from a known value, such as a mathematical, geometric, trigonometric, size, phase, and the like, and the sam value can be generated from examination of a document having the embedded optical pattern (22). The document (20) can be validated, authenticated, or the determination of a valid copy of an original document with the embedded optical signature made through comparison of the known value and the value generated from the optical pattern (22) on the document (20). The optical pattern (22) can also be generated from other identification codes on the document (20).