When a LUKS encrypted partition pops up the unlock window it gives 3 options for how to remember the password. The "Remember password until you logout" is always ticked by default. Is there a way to make "Forget password immediately" the default?
Enter a passphrase to unlock the volume:
[ ] Forget password immediately
[x] Remember password until you logout
[ ] Remember forever
I believe the setting comes from your desktop environment, e.g. GNOME. Not related to LUKS or the encryption.
If GNOME is your desktop environment, you should change GNOME settings. One way is to install
gconf-editor
byYou might be able to find the relevant default setting there.