If we have memory dump it is easy to find the key. Nothing new. Defenses are - never sleep the damn thing or hibernate just power off. And make sure you do not

If we have memory dump it is easy to find the key. Nothing new. Defenses are - never sleep the damn thing or hibernate just power off. And make sure you do not have any DMA ports on the PC. And finally - hope you live in a country where the cops are not proficient in thermorectal cryptoanalisys.