Abstract: A consistency analysis system provides consistency analysis for a control system that includes sensors for monitoring a number of different physical parameters. The analysis system uses a rules set and overlapping or redundant sensor data to determine alterations in system behavior or parameters even in the presence of subversion designed to alter or hide sensor trace data. Specific embodiments deliberate perturb the system or alters sensor data in order to detect whether other system or sensor data responds consistently to the perturbation. Specific embodiments also comprise associated methods performed by logic apparatus.