Patent ID: 11895152
Assignee: SCHWEITZER ENGINEERING LABORATORIES, INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 6:
7. An intelligent electronic device (IED) of an electric power delivery system, wherein the TED comprises:
processing circuitry; and
a memory comprising instructions, wherein the instructions, when executed by the processing circuitry, are configured to cause the processing circuitry to perform operations comprising:
receiving a request for a security association key (SAK) from an additional TED of the electric power delivery system, the request including an initial SAK converted from a stored connectivity association key (CAK), communicated via an initial media access control security (MACsec) communication link;
verifying an identity of the additional TED based on the request; and
in response to verifying the identity of the additional TED, transmitting a copy of a stored SAK to the additional TED for communicating data via a MACsec communication link instead of via the initial MACsec communication link using the stored SAK instead of the initial SAK.