US 11,677,268 B2
Media access control security (MACsec) application cryptographic fingerprinting
Colin Gordon, Katy, TX (US); and Sai Krishna Raghupathula, Pullman, WA (US)
Assigned to Schweitzer Engineering Laboratories, Inc., Pullman, WA (US)
Filed by Schweitzer Engineering Laboratories, Inc., Pullman, WA (US)
Filed on Sep. 1, 2020, as Appl. No. 17/8,876.
Prior Publication US 2022/0069618 A1, Mar. 3, 2022
Int. Cl. H02J 13/00 (2006.01); H04L 9/40 (2022.01); H04L 9/08 (2006.01); H04L 12/10 (2006.01); H04L 45/745 (2022.01); H04L 9/06 (2006.01)
CPC H02J 13/00016 (2020.01) [H02J 13/00001 (2020.01); H02J 13/00028 (2020.01); H02J 13/00034 (2020.01); H04L 9/0643 (2013.01); H04L 9/0819 (2013.01); H04L 12/10 (2013.01); H04L 45/745 (2013.01); H04L 63/0428 (2013.01); H04L 63/062 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An intelligent electronic device (IED), comprising:
a memory; and
a processor operatively coupled to the memory, wherein the processor is configured to execute instructions stored on the memory to cause operations comprising:
receive from a key server of a communication network, a secure association key (SAK) with a confidentiality offset associated with an application protocol;
generate a frame comprising a port identifier associated with the application protocol of a network stack of the communication network of a power system to allow a receiving device on the communication network to identify the application protocol of the frame using the port identifier;
wherein the frame includes an unencrypted portion and an encrypted portion based on the confidentiality offset; and
sending the frame to the receiving device.