Generating authentication codes associated with devices

摘要

A method and system for use in generating authentication codes associated with devices is disclosed. In at least one embodiment, the method and system may generate a secret value that depends on event state data that specifies an operating condition of a device, and may generate a series of authentication codes that depends on the secret value and a series of dynamic values.

主权项

1. A method for use in generating authentication codes associated with devices, the method comprising:
generating, via an authentication device, a secret value using a key derivation function wherein inputs to the key derivation function include a master secret value and event state data, the event state data specifying an operating condition of the authentication device; generating, via the authentication device, a first series of authentication codes that depends on the secret value and a series of dynamic values change over time; modifying, via the authentication device, the event state data as a result of a change to the operating condition of the authentication device; generating, via the authentication device, a new secret value using the key derivation function wherein inputs to the key derivation function include a master secret value and the modified event state data; and generating, via the authentication device, a second series of authentication codes that depends on the new secret value and a new series of dynamic values.