On-line PIN verification using polynomials

Registers – Systems controlled by data bearing records – Credit or identification card systems

Reexamination Certificate

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C235S382000, C380S044000

Reexamination Certificate

active

07059517

ABSTRACT:
A technique for on-line Personal Identification Number (PIN) verification uses polynomial hiding. The technique comprises enrolling a smart card, including initializing a smart card with an entity-selected PIN hidden in a polynomial over a finite field. The initialization polynomial is a function of the PIN, an entity-identifier, and a random number. The random number and the PIN are discarded after smart card initialization.

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