Solid state key for controlling access to computer software

A semiconductor device that functions as a key to control access to a software program resident in a computer. The device includes a continuously running pulse generator that produces an output representative of real time, a shift register permanently storing a unique number and circuitry for execut...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	CARGILE, WILLIAM P
Format:	Patent
Sprache:	eng
Schlagworte:	ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDEDFOR ELSEWHERE CALCULATING CHECKING-DEVICES COIN-FREED OR LIKE APPARATUS COMPUTING COUNTING ELECTRIC DIGITAL DATA PROCESSING GENERATING RANDOM NUMBERS PHYSICS REGISTERING OR INDICATING THE WORKING OF MACHINES TIME OR ATTENDANCE REGISTERS VOTING OR LOTTERY APPARATUS
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