A system and associated method for authorizing, or withholding authorization of, user access to a selected computer application or other resource, based on the user's response to one or more user authentication tests. If the user satisfies one or more authentication tests but satisfies less than all...http://www.google.es/patents/US6711681?utm_source=gb-gplus-sharePatente US6711681 - Cryptographic authorization with prioritized authentication
Cryptographic authorization with prioritized authentication
