Validation protocol and system

Details Validation protocol and system Validation protocol and system

2007-07-24

2007-07-24

Nguyen, Nga (Department: 3692)

Data processing: financial, business practice, management, or co

Business processing using cryptography

Secure transaction

C705S016000, C705S017000, C705S018000, C705S041000, C705S065000, C705S067000, C380S030000, C380S046000, C380S051000, C380S259000, C380S277000, C713S155000, C713S159000, C713S167000, C713S168000, C713S170000, C713S176000, C713S182000, C713S189000

Reexamination Certificate

active

09517539

ABSTRACT:
This invention concerns a validation protocol for determining whether an untrusted authentication chip is valid, or not. The protocol may be used to determine the physical presence of a valid authentication chip and from that determine whether a consumable containing the chip is valid. In another aspect the invention also concerns a system for validating the chip. The invention involves generating a random number in a trusted authentication chip, then applying a keyed one way function to the random number in both the trusted authentication chip and an untrusted authentication chip and comparing the outcomes. A match indicates that the untrusted chip is valid.

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