People are very creative in defeating those mechanisms. It's mostly a question of time. Also doesn't help if there's some side channel or software leak. The on

People are very creative in defeating those mechanisms. It's mostly a question of time. Also doesn't help if there's some side channel or software leak. The only "truly" 'safe-ish' thing is active battery powered intrusion detection. It's done for high end HSMs… which easily sell for 5 or 6 digit prices.