Method and a system for verifying authenticity safe against forg

Details Method and a system for verifying authenticity safe against forg Method and a system for verifying authenticity safe against forg

1978-04-20

1980-08-19

Yusko, Donald J.

Communications: electrical

Digital comparator systems

235380, 235493, G05B 100, G06K 708, G06K 500, G11B 502

Patent

active

042186749

ABSTRACT:
This invention relates to a method and system for verifying authenticity safe against forgery of an object releasing a function said object being of base material having random imperfections in or on the same, comprising measuring random imperfections in or on the base material of said object in a predetermined measuring track over the surface of said object of base material having random imperfections in or on the same by means of a detector for detecting said random imperfections, said random imperfections optionally being supplied to said base material, converting said measured random imperfections into pulses, supplying said pulses together with timing pulses to an AND gate, whereby only simultaneously arriving pulses are passed, supplying said passed pulses to a shift register shifting with said timing pulses to obtain a binary code, comparing said binary code with a previously stored binary code of the same object, whereby the function is released if said binary codes are identical; as well as a system for carrying out the method.

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