Secure tag validation

Details Secure tag validation Secure tag validation

2007-08-28

2007-08-28

Porta, David (Department: 2884)

Radiant energy

Luminophor irradiation

Reexamination Certificate

active

11367973

ABSTRACT:
A reader for validating a secure tag. The reader comprises: an optical source operable to illuminate the secure tag; a processor coupled to the optical source and operable to activate and de-activate the optical source; and a luminescence detector coupled to the processor and operable to measure a luminescence spectrum after a time delay has elapsed. The time delay may be based on a number generated by the reader in a random or pseudo-random manner, or it may be received across a network from a remote server. The processor is operable to accessing the time delay and to derive a luminescence signature from a luminescence spectrum measured by the luminescence detector. The processor is then operable to create a control signature using the time delay, to compare the derived luminescence signature with the control signature, and to validate the secure tag in the event of a match.

REFERENCES:
patent: 7067824 (2006-06-01), Muller et al.
patent: 2007/0108392 (2007-05-01), Ross

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