Personal date/time notary device

Details Personal date/time notary device Personal date/time notary device

2005-03-08

2005-03-08

Morse, Gregory (Department: 2137)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C713S159000, C713S172000, C713S178000, C713S152000, C713S152000, C380S259000, C705S065000, C705S073000, C705S075000, C705S076000

Reexamination Certificate

active

06865678

ABSTRACT:
A personal data/time notary device is embodied in a token device such as a “smart card”. The portable notary device includes an input/output (I/O) port, which is coupled to a single integrated circuit chip. The I/O port may be coupled to a conventional smart card reading device which in turn is coupled to a PC, lap-top computer or the like. A tamper resistant secret private key storage is embodied on the chip. The private key storage is coupled to the processor which, in turn, is coupled to a permanent memory that stores the program executed by the processor. At least one clock is embodied on the card. A second clock14and a random value generator10are also preferably coupled to the processor. The device combines digital time notarization into a digital signature operation to ensure that a time stamp is always automatically present. The user does not need to be involved in any additional decision making as to whether time stamping is necessary.

REFERENCES:
patent: 4290130 (1981-09-01), Lowdenslager et al.
patent: 4456386 (1984-06-01), Dellea
patent: 4799258 (1989-01-01), Davies
patent: 4837822 (1989-06-01), Crosley et al.
patent: 4974193 (1990-11-01), Beutelspacher et al.
patent: 5001752 (1991-03-01), Fischer
patent: 5022080 (1991-06-01), Durst et al.
patent: 5136643 (1992-08-01), Fischer
patent: 5136646 (1992-08-01), Haber et al.
patent: 5136647 (1992-08-01), Haber et al.
patent: 5189700 (1993-02-01), Blandford
patent: 5887065 (1999-03-01), Audebert
patent: 0 422 757 (1990-05-01), None
patent: 0 427 515 (1991-05-01), None
patent: 61-724363 (1986-04-01), None
patent: WO 9212485 (1992-07-01), None
Smart Card 2000: The Future of IC Cards, D Chaum & I. Schaumuller-Cichl, pp. 139-146, Laxwnburg, Austria, Oct. 19-20, 1987.
Jahrbuch Der Deutschen Gesellschaft Fur Chronometrie, vol. 25, No. 2, Feb. 1974, Stuttgart De, pp. C12-1 C12-9, Burth 'Die Rationelle Ermittlung Des Optimalen Abgleiches Bei Quarzuhren Mit Der Integrierten Schaltung Saj 310', p. C6, line 1—p. C7, line 9; Figure 3.
Akl, “Digital Signatures: A Tutorial Survey”,Computer, vol. 16, No. 2, pp. 15-24, Feb. 1983.
Davies et al.,Security for Computer Networks, pp. 275-277 and 287, 1984.
Denning,Crptography and Data Security, p. 165, 1982.
Simmons, “Introduction”,Secure Communications and Asymmetric Cryptosystems, pp. 1-8, (Gustavus J. Simmons, ed., 1982).
Williams, “Computationally “Hard” Problems as a Source for Cryptosystems”,Secure Communications and Asymmetric Cryptosystems, pp. 11-39, (Gustavus J. Simmons, ed., 1982).
Diffie, “Conventional Versus Public Key Crptosystems”,Secure Communications and Asymmetric Cryptosystems, pp. 41-72, (Gustavus J. Simmons, ed., 1982).
Merkle, “Protocols for Public Key Cryptosystems”,Secure Communications and Asymmetric Cryptosystems, pp. 73-104, (Gustavus J. Simmons, ed., 1982).
Popek et al., “Encrypton and Secure Computer Networks”,Computing Surveys, vol. 11, No. 4, Dec. 1979, pp. 331-356.
Denning et al., “Timestamps in Key Distribution Protocols”,Communications of the ACM, Aug., vol. 24, No. 8, 1981, pp. 533-536.
Merkle, “Protocols for Public Key Cryptosystems”,IEEE Computer Society, Proceedings of the 1980 Symposium on Security and Privacy, Apr. 14-16, 1980, Oakland, CA., pp. 122-134.
Denning, “Protecting Public Keys and Signature Keys”, Computer, vol. 16, No. 2, Feb. 1983, pp. 27-35.
Rihaczek et al., “Tele Trust: Smart Card Access to Servers”,Smart Card 2000: The Future of IC Cards, pp. 139-146, (David Chaum and Ingrid Schaumüller-Bichl, eds.) (1987).
Caelli, “Privacy and Security in Office Automation Systems”,The Australian Computer Journal, vol. 17, No. 3, Aug. 1985, pp. 126-130.
Diffie et al., New Directions in Cryptography,IEEE Transactions on Information Theory, vol. IT22, No. 6, pp. 644-654, Nov. 1976.

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