Cryptography – Cryptanalysis
Patent
1995-03-06
1996-02-27
Cain, David C.
Cryptography
Cryptanalysis
380 23, 340468, H04L 900
Patent
active
054955319
ABSTRACT:
To enable control to be exercised over the use of equipment, a chip is built into the electronic circuitry of the equipment which chip has stored therein a series of pseudo-random numbers. When a crypto unit of the chip receives a first number generated by a controlling computer the pseudo-random number sequence is generated on the basis of an algorithm which is stored in the crypto unit of the chip. The first number is generated when data, including the serial number of the equipment, is entered into the controlling computer. The serial number of the equipment is entered in a read only memory of the chip so that the serial number of the equipment is a permanent and unalterable part of the electronic circuitry. Various uses to which equipment having its serial number entered in a chap thereof are also disclosed.
REFERENCES:
patent: 4757533 (1988-07-01), Allen et al.
patent: 4864494 (1989-09-01), Kobus, Jr.
patent: 4916617 (1990-04-01), Norwood
patent: 4916737 (1990-04-01), Chomet et al.
patent: 5105179 (1992-04-01), Smith
patent: 5222135 (1993-06-01), Hardy et al.
patent: 5226080 (1993-06-01), Cole et al.
patent: 5321241 (1994-06-01), Craine
Derwent Publns. Ltd. May 1992 "Secure Technique for Activating Feature Options . . . " 92-198882.
Derwent Publns. Ltd.--92-251175 Feb. 1992.
Cain David C.
Son Holdings Limited of c/o Celtic Trust Company Limited
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