ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,393,738, issued on Aug. 19, was assigned to Drexel University (Philadelphia).
"Enhanced circuity security through hidden state transitions" was invented by Kyle Joseph Juretus (Quakertown, Pa.) and Ioannis Savidis (Wallingford, Pa.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A state machine system on a chip presents hidden state transitions to create IC knowledge not available in a logical netlist and temporal key dependencies to increase the difficulty of executing the SAT attack. The change in the state space of a circuit over time may be used to increase circuit security. Hidden transitions that are frequency dependent, state dependent keys, and t...