Software protection system

Details Software protection system Software protection system

1981-10-05

1984-09-11

Cangialosi, Sal

Telegraphy

Systems

Printing

178 2219, 364200, H04L 900

Patent

active

044711638

ABSTRACT:
A protection system for controlling the operation of a digital computer as to a particular program wherein a program "lock" interfaces with the computer and authorizes the operation in response only to a selected relation between a number in the program, a number in the lock, and a third number, a "key", supplied to the lock and which bears a selected relation to both the program number and lock number.

REFERENCES:
patent: 3566362 (1971-02-01), Taylor
patent: 3996449 (1976-12-01), Attanasio et al.
patent: 4120030 (1978-10-01), Johnston
patent: 4278837 (1981-07-01), Best
patent: 4309289 (1981-12-01), Lumley
IBM Tech Disclosure Bulletin, vol. 21, No. 2, (7/78), pp. 836-837, Gurug/e/ .

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