Patent attributes
Instruction classification and software intrusion detection is performed. Program instruction execution of a processor of a microcontroller unit (MCU) is monitored via side-channel signal analysis, the monitoring including capturing a signal trace of a physical property of the MCU that leaks information correlated with the program instruction execution of the MCU, the signal trace indicating a value of the physical property over time. From the signal trace, time domain features, frequency domain features, and Mel Frequency Cepstral Coefficients (MFCC) features are extracted. A model is utilized for instruction detection to identify an execution signature based on the time domain features, frequency domain features, and MFCC features. The execution signature is compared to one or more reference instruction signatures. A remedial action is performed responsive to the execution signature failing to match to the one or more reference instruction signatures.
