It is presented a reader device arranged to determine access rights of an electronic access key for gaining access to open an electronically controlled physical lock. The reader device supports a plurality of electronic access key protocols and the reader device comprises: a near field radio frequency communication device arranged to read access data from an electronic access key; a controller arranged to determine, based on the access data read from the electronic access key, whether the electronic access key is eligible to open the electronically controlled physical lock; wherein the near field radio frequency communication device is further arranged to read configuration data from an electronic configuration key; and the controller is arranged to inactivate at least one electronic access key protocol in the reader device based on the configuration data. A corresponding method is also presented.