Patent ID: 8015597
Filing Date: 2011-09-06
Classification: H04L

Abstract:
1. A method for issuing and disseminating data about a credential, comprising: (a) having an entity issue authenticated data indicating that the credential has been revoked, wherein the authenticated data is different from the credential; (b) causing the authenticated data to be stored in a first card of a first user; (c) utilizing the first card for transferring the authenticated data to a first door; (d) having the first door store the authenticated data; and (e) having the first door rely on the authenticated data to deny access to the credential, wherein the authenticated data causes denial of access to the credential even if the credential has not expired and is otherwise valid, and wherein, prior to relying on the authenticated data to deny access to the credential, the credential is validated at the first door using a proof of validity of the credential, the proof being different from the authenticated data, wherein validating the credential using the proof includes applying a one way function to the proof a specified number of times and comparing a result thereof to information provided on the credential.