With this model, you are perfectly safe if someone steals your computer and tries to access the information when the computer is off (if the computer is on, you have probably heard about the cold boot attack which allows someone to freeze the ram in order to delay the info from fading away and recover your encryption key).
Kwa mtindo huu, wewe ni salama kikamilifu kama mtu akiiba kompyuta yako na anajaribu kupata habari wakati wa kompyuta ni mbali (kama kompyuta ni juu ya, wewe pengine kusikia kuhusu mashambulizi baridi Boot ambayo inaruhusu mtu kwa kufungia kondoo ili kuchelewesha info kutoka fading mbali na kupona encryption yako muhimu).