Identification system

Details Identification system Identification system

1985-12-04

1987-12-01

Trafton, David L.

Registers

Systems controlled by data bearing records

Credit or identification card systems

235379, 235493, 34082534, 380 25, G06K 500

Patent

active

047106131

ABSTRACT:
An identification system wherein validity between a first unit and a second unit is identified when the first unit is electrically communicated with the second unit. The first unit includes a generator for generating identification code information, a calculator for calculating, based upon the identification code information, an estimation time required for processing the identification code information in the second unit, a time counter for measuring an actual time required for completely processing the identification code information in the second unit, and an unit for identifying validity between said first and second units by comparing the actual processing time to the estimation processing time. The second unit includes at least a processor for processing the identification code information sent from the first unit.

REFERENCES:
patent: 4123747 (1978-10-01), Lancto et al.
patent: 4423287 (1983-12-01), Zeidler
patent: 4529870 (1985-07-01), Chaum

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