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公开(公告)号：EP0778968A4
公开(公告)日：2002-10-09
申请号：EP95931645
申请日：1995-08-29
CPC分类号： G06K7/10851 , G06K7/10861 , G06K7/12 , G06K19/14
摘要： Accessory apparatus (30, 310, 410, 510, 930) for authenticating articles is used in conjunction with existing readers or scanners of articles (10) bearing stored date (110), such as credit cards or identification cards. The apparatus is used with existing readers (20) of such cards, to perform authentication functions without replacing or obsoleting such existing readers. The accessory apparatus is disposed before, after, on, under, inside, or adjacent to existing reader apparatus, to have a view of the article whose data is to be read. Information in addition to the stored data is coded on the article in non-visible indicia (120) detected by the accessory authenticating apparatus. This coded additional information may be related to identification data stored in the article's normal storage, such as a magnetic stripe or embedded memory chip. The additional information is coded in combinations of predetermined characteristics of light emitted by the article when the article is irradiated with non-visible light (1115) by the accessory. The coded combinations are preferably complex combinations of the various radiation characteristics. Irradiating radiation is modulated at a high frequency above 10,000Hz for rapid authentication, and for a decoding bar codes.
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公开(公告)号：EP0721717A4
公开(公告)日：1997-12-29
申请号：EP94928655
申请日：1994-09-23
CPC分类号： G06K7/12 , G07D7/1205 , G07D7/121
摘要： A system for authentication of articles uses a multiplicity of discriminating variables (40) to characterize light detected (70) from the articles (30) after predetermined illumination (10, 20). Articles (30) are tested which have been marked with substances such as dye or ink that fluoresce in a region of the optical spectrum (70) when illuminated with light in another region of the spectrum (30) such as the ultraviolet region. The authentication system illuminates the articles with light (20) modulated at a frequency of more than about 50 kHz, and a secondary fluorescent light (70) returned from the articles (30) is synchronously detected. A programmable microcomputer (85) digitizes the synchronously detected signal and analyzes it to compare the signal with predetermined standard digital signals. The standard signals incorporate a number of discriminating features, for example the fluorescent light's wavelengths, amplitudes, and time delays relative to the modulated illuminating light. The standard signals may also incorporate spatial distributions such as bar codes as discriminating features.
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