Number | Name | Date | Kind |
---|---|---|---|
3852571 | Hall et al. | Dec 1974 | |
4528643 | Freeny, Jr. | Jul 1985 | |
4594663 | Nagata et al. | Jun 1986 | |
4823264 | Deming | Apr 1989 | |
4960981 | Benton et al. | Oct 1990 | |
5053956 | Donald et al. | Oct 1991 | |
5283731 | Lalonde et al. | Feb 1994 | |
5319705 | Halter et al. | Jun 1994 | |
5336870 | Hughes et al. | Aug 1994 | |
5383113 | Kight et al. | Jan 1995 | |
5404393 | Remillard | Apr 1995 | |
5426281 | Abecasis | Jun 1995 | |
5475585 | Bush | Dec 1995 | |
5479510 | Olsen et al. | Dec 1995 | |
5590197 | Chen et al. | Dec 1996 | |
5592375 | Salmon et al. | Jan 1997 | |
5606361 | Davidsohn et al. | Feb 1997 | |
5619558 | Jhetta | Apr 1997 | |
5661517 | Budow et al. | Aug 1997 | |
5677955 | Doggett et al. | Oct 1997 |
Entry |
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Achieving Electronic Privacy, by David Chaum, article in Scientific America downloaded from Internet., Aug. 1992. |
Preparid Smart Card Techniques: A Brief Introduction and Comparison, Online discussion by David Chaum, Copyright 1994. |