Provided is a controller for use with a gas turbine engine, which ensures a stable combustion regardless of the deterioration of the catalyst and elevated characteristics of the exhaust gas. The circuit is multi-threshold, voltage-biased and includes a p-channel field effect transistor and an n-channel FET. The load monitor senses the actual loading of the vehicle and provides a corresponding feedback signal to the steering controller. By reducing the size of these prime numbers and arriving at the decrypted message using the Chinese Remainder Theorem, the efficiency of establishing a secure communications session is increased.