I think it’s a little bit of column A and a little bit of column B, but admit while I remember reading about using technique a long time ago, I’m not sure of th

I think it’s a little bit of column A and a little bit of column B, but admit while I remember reading about using technique a long time ago, I’m not sure of the history of the nomenclature. From the StackExchange: > For those who think this is only theoretical: They were able to use this technique to create a bootable USB device which could determine someone's Truecrypt hard-drive encryption key automatically, just by plugging it in and restarting the computer. They were also able to recover the memory-contents 30 minutes+ later by freezing the ram (using a simple bottle of canned-air) and removing it. Using liquid nitrogen increased this time to hours.