Method of improved cyber security with frequency separation

An aircraft comprising:

• a first data link;
• a second data link;
• an aircraft engine;
• and
• an aircraft engine control system operably coupled to the aircraft engine comprising:
• a control node comprising a first processor;
• and
• a concentrator node comprising a second processor and operably coupled to the control node via the first data link and via the second data link, wherein the control node is configured to:
• communicate with the concentrator node over the first data link at a first communication frequency at a first communication rate;
• communicate with the concentrator node over the second data link at a second communication rate that is different than the first communication rate, wherein the control node:
• detects a cyber security threat;
• and
• changes the first communication frequency in response to detecting the cyber security threat.

A method for controlling an aircraft engine comprising:

• communicating, by a first processor of a control node, with a second processor of a concentrator node over a first data link at a first communication frequency at a first communication rate;
• communicating, by the first processor of the control node, with the second processor of the concentrator node over a second data link at a second communication rate that is different than the first communication rate;
• detecting, by the first processor of the control node, a communication anomaly over the first data link;
• changing, by the first processor of the control node, the first communication frequency in response to the detected communication anomaly;
• and
• communicating, by the first processor of the control node, with the second processor of the concentrator node over the first data link at the changed first communication frequency.