Comment Re:CPU cache? (Score 1) 398
L1/L2 caches probably wouldn't be the best place to store keys since they're really just SRAM (static RAM). That is to say, the state of the memory will remain when power is lost, unless it's explicitly overwritten. If you wish to learn more about how memory storage is implemented on CPUs (registers, L1/L2 caches in modern machines), see wikipedia's article on Flip-flops (electronics).