An authentication device includes at least one processor, at least one computer-readable medium, and program instructions stored on the at least one computer-readable medium for execution by the at least one processor. The program instructions include first program instructions to wirelessly pair the authentication device with a controlled access device. The program instructions further include second program instructions to broadcast data indicative of an authorization to grant access to the controlled access device, while the controlled access device is within a predefined range of the authentication device, upon successfully pairing with the controlled access device.