Combating Stealthy Thermal Covert Channel Attack With Its Thermal Signal Transmitted in Direct Sequence Spread Spectrum

Many-core systems are susceptible to attacks launched by thermal covert channel (TCC) attacks. Detection of TCC often relies on the use threshold-based approaches or variants, and a countermeasure thwart can be applied only after an attack is deemed present. In this article, we describe direct sequence spread spectrum (DSSS)-based TCC, where its data modulated pseudo-random bit sequence. Unfortunately, such DSSS-based has extremely low signal strength that nearly indistinguishable from noise thus cannot detected any existing detection methods. To combat stealthy propose novel scheme lets received pass through differential filter irrelevant frequency components occupied mainly gets eliminated filtered next compared against threshold for successful detection. Experimental results show effectively survive methods with BER as 4%. contrast, proposed applied, accuracy jumps 89%, soars 50%, which indicates practically shut down.