I have fully encrypted my laptop using dm-crypt and luks. So If I start my laptop I was prompted for a password before init will start. This works just fine.
A possible attacker will know if he types in a password (i.e by trying) that his guessed password is wrong because luks refuses to decrypt that device. So I'm wondering if there is a way to circumvent this.
If someone enters a wrong password (read: Any literal that was not defined), a fake block device should get mounted (maybe I have to format and install another plain-unix there before) and booted, so that no one can determine (without inspecting the hard-disk any further) if the password was correct or not.
If this is not possible, it can also be another literal which is predefined to mount another block-device.