Patent attributes
An access control system and method are described. In an example, an access control system includes a tag that interacts with a mobile device and communicates door information to the mobile device. The mobile device provides at least some of the information obtained from the tag to a trusted tag server that is configured to analyze whether or not the information was obtained from a valid and trustable tag. The trusted tag server may then forward along the door information to an access control server for analysis in connection with making an access control decision for the mobile device or a holder thereof. Results of the access control decision can be communicated to a mechanism that actuates and controls a protected asset that is within a predetermined proximity of the tag, thereby enabling access control without a dedicated access control reader deployed on or near the protected asset.