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4234932 | Gorgens | Nov 1980 | |
4314352 | Fought | Feb 1982 | |
4390968 | Hennessy et al. | Jun 1983 | |
4438326 | Uchida | Mar 1984 | |
4650978 | Hudson et al. | Mar 1987 | |
4755940 | Brachtl et al. | Jul 1988 | |
5220501 | Lawlor et al. | Jun 1993 | |
5371797 | Bocinsky, Jr. | Dec 1994 | |
5373558 | Chaum | Dec 1994 | |
5434919 | Chaum | Jul 1995 | |
5438186 | Nair et al. | Aug 1995 | |
5440108 | Trean et al. | Aug 1995 | |
5444616 | Nair et al. | Aug 1995 | |
5448047 | Nair et al. | Sep 1995 | |
5455407 | Rosen | Oct 1995 | |
5850442 | Muftic | Dec 1998 |
Entry |
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International Search Report re PCT/US97/15701. |
Article from Scientific American entitled "Achieving Electronic Privacy" by David Chaum, Aug. 1992; pp. 96-101. |
Article entitled "Security Without Identification: Transaction Systems to Make Big Brother Obsolete" by David Chaum, Communications of the ACM; vol. 28 No. 10; Oct. 1985; pp. 1030-1044. |
Article entitled "Online Cash Checks" by David Chaum, Advances in Cryptology EUROCRYPT '89; J.J. Quisquarter & J. Vanderwalle (Eds.), Springer-Verlag; pp. 288-293. |