Patent ID: 7954161

Claim:
A method for characterizing system security of a device under analysis (DUA), comprising: sending a plurality of test messages to attack the DUA; sending a plurality of instrumentation commands to the DUA, the sending of the plurality of instrumentation commands interleaved with the sending of the plurality of test messages; measuring response times for the DUA to successfully respond to each of the plurality of instrumentation commands; responsive to observing no response from the DUA to one of the plurality of instrumentation commands for a predetermined period of time: restarting the DUA, and resending test messages sent to the DUA prior to sending the one of the plurality of instrumentation commands that receives no response; responsive to the DUA sending a message indicating system busy in response to a second one of the plurality of instrumentation commands, resending the second one of the plurality of instrumentation commands to the DUA; and characterizing the system security based, at least in part, on the measured response times.