METHOD AND SYSTEM FOR PROTECTING PRODUCTS AND TECHNOLOGY FROM INTEGRATED CIRCUITS WHICH HAVE BEEN SUBJECT TO TAMPERING, STRESSING AND REPLACEMENT AS WELL AS DETECTING INTEGRATED CIRCUITS THAT HAVE BEEN SUBJECT TO TAMPERING

摘要

A system employs physical unclonable functions of an integrated circuit for detecting integrated circuits and protecting products and technology from integrated circuits which have been subject to tampering, stressing and replacement, and counterfeit components. The system includes a sensor detecting a characteristic impedance generated as a result of controlled access to a memory device of the integrated circuit. The characteristic impedance is applied in the creation of a discrimination matrix of values based on electrical interface signals for the integrated circuit. The sensor includes a ring oscillator and associated monitoring components. The ring oscillator is composed of the memory device of the integrated circuit and a sensory circuitry, wherein changes in a frequency generated by the ring oscillator is indicative of changes in circuitry.