Abstract: A computer implemented method of locating an asset with an RFID tracker within a secured zone includes receiving an UUID of the RFID tracker via a first RFID broadcast; determining a first signal strength of the first RFID broadcast; receiving the UUID of the RFID tracker via a second RFID broadcast; determining a second signal strength of the second RFID broadcast; receiving the UUID of the RFID tracker via a third RFID broadcast; determining a third signal strength of the third RFID broadcast; and determining a first location of the RFID tracker at a first time based on the first, second and third signal strengths. A computer implemented method of tracking an asset with an RFID tracker includes locating an asset; determining if the asset is in an allowed zone; if asset is in the allowed zone, repeating the steps of locating and determining; and if an asset is not in the allowed zone, sending a security alert.

Abstract: An access control system includes an access control device and an authentication system. The access control device has an RFID reader for receiving RFID information and at least one other authentication device for receiving authentication information. The authorization system grants or denies access based on the RFID information and the authentication information. The access control device and authorization system are part of a same secure community of interest.