US Patent 9509719 Self-provisioning access control

A processor-implemented access control method includes receiving credential and policy directory information to configure an access controller to allow self-provisioning of the access controller through periodic, automated query of the directory by the access controller; acquiring from the directory, credential and policy information for one or more individuals who may require access; storing in a local cache the acquired credential and policy information; receiving an access request to allow an individual access; comparing the access request to the credential and policy information in the cache; and when the comparison indicates a match, granting the individual access.