An intelligent electronic device (IED) includes memory and a processor operatively coupled to the memory. The processor is configured to establish, over a communication network of a power system, a communication link according to a media access control security (MACsec) Key Agreement (MKA). The TED receives a plurality of access control secure association keys (SAKs) via the communication link. The TED receives one or more checked-out SAKs indicating a request to access the TED The TED allows access based on the one or more checked-out access control SAKs matching at least one of the plurality of access control SAKs.