US 11,811,947 B2
Systems and methods for communicating data securely for an electric power delivery system
Colin Gordon, Katy, TX (US)
Assigned to Schweitzer Engineering Laboratories, Inc., Pullman, WA (US)
Filed by Schweitzer Engineering Laboratories, Inc., Pullman, WA (US)
Filed on Aug. 31, 2021, as Appl. No. 17/462,246.
Prior Publication US 2023/0066208 A1, Mar. 2, 2023
Int. Cl. G06F 21/00 (2013.01); H04L 9/32 (2006.01); G06F 16/23 (2019.01); G06F 21/64 (2013.01)
CPC H04L 9/3242 (2013.01) [G06F 16/2379 (2019.01); G06F 21/64 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An intelligent electronic device (IED) of an electric power delivery system, the IED comprising:
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 first data via parallel redundancy protocol (PRP);
generating a first integrity check value using a media access control security (MACsec) integrity check function based on the first data;
receiving second data via PRP;
generating a second integrity check value using the MACsec integrity check function based on the second data;
comparing the first integrity check value and the second integrity check value with one another; and
outputting a notification in response to determining that the first integrity check value and the second integrity check value do not match one another.