Patent Document ID: 20090083833
Application ID: 12234095
Patent Status: 0

Claim One:
1. A method for authenticating a device using an authentication station, said device providing a capability to accept a challenge value from the authentication station and return a response value to the challenge value to the authentication station that depends on fabrication characteristics of the device, the method comprising: identifying the device, including accepting identification data at the authentication station from the device to be authenticated; determining authentication data characterizing one or more pairs of challenge and response values associated with the identified device that were previously obtained by a trusted authority in communication with the device, wherein said retrieving of the data does not require communication between the authentication station and the trusted authority after identifying the device; providing a first challenge value from the authentication station to the device; accepting a first response value at the authentication station from the device; determining whether the pair of the first challenge value and the first response value sufficiently match the authentication data.