http://www.w5j6stm77zs6652pgsij4awcjeel3eco7kvipheu6mtr623eyyehj4yd.onion/w/index.php?title=Cold_Boot_Attack_Defense
In the case of notebooks, the battery should be removed after powering off. Cold boot attacks are a clear and present danger for high-risk users due to the limited countermeasures available. In the purely hypothetical situation where an adversary is knocking earnestly on the door, safest would be pressing a panic button on the host, leading to the contents of RAM being quickly wiped.