This is a continuation of application Ser. No. 08/330,459, filed Oct. 28, 1994, abandoned.
Number | Name | Date | Kind |
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RE34954 | Haber et al. | May 1995 | |
4309569 | Merkle | Jan 1982 | |
4405829 | Rivest et al. | Sep 1983 | |
4881264 | Meakle | Nov 1989 | |
5136646 | Haber et al. | Aug 1992 | |
5136647 | Haber et al. | Aug 1992 | |
5373561 | Haber et al. | Dec 1994 | |
5432852 | Leighton et al. | Jul 1995 |
Entry |
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Bayes, et al., "Improving the Efficiency and the Reliability of Digital Time-Stamping", sequences II methods in communication, security, and computer science, editors R.M. Capocelli, et al. pp. 329-334, (Springer-Verlag, New York 1993). |
Haber et al., "How to Time-Stamp a Digital Document", Journal of Cryphotography, vol. 3, No. 2, pp. 99-111 (1991). |
Number | Date | Country | |
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Parent | 330459 | Oct 1994 |