AUTHENTICATION SYSTEM

In an authentication system for badges carried by persons, a base station, in response to an infra-red call-up signal from a badge, challenges the carrier with an infra-red PPM signal in the form of a random number and the badge (Fig. 1) generates an encrypted infra-red PPM response signal obtained...

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Bibliographische Detailangaben
Hauptverfasser:	DAVID JOHN WHEELER, ANDREW HOPPER, ROY WANT, ROGER MICHAEL NEEDHAM
Format:	Patent
Sprache:	eng
Schlagworte:	ANALOGOUS ARRANGEMENTS USING OTHER WAVES ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDEDFOR ELSEWHERE CHECKING-DEVICES DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES GENERATING RANDOM NUMBERS LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION REGISTERING OR INDICATING THE WORKING OF MACHINES TESTING TIME OR ATTENDANCE REGISTERS VOTING OR LOTTERY APPARATUS
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Beschreibung
Zusammenfassung:	In an authentication system for badges carried by persons, a base station, in response to an infra-red call-up signal from a badge, challenges the carrier with an infra-red PPM signal in the form of a random number and the badge (Fig. 1) generates an encrypted infra-red PPM response signal obtained by combining the random number with a unique password to be verified at the base station before a signal signifying authentication is produced. e.g. to unlock an access door.