Shoutbox

Hi everyone, not sure if this has been suggested before, is available or is even possible.. but this idea came to me the other day when I was thinking how much of a pain it is to type my password every time.
I was wondering if through a plugin, loader ?? etc it was possible to have a key shortcut combination of say 3 keys that when pressed automatically begins signing you in with you already configured username and password.
Before anyone suggests using the option about signing in automatically when connected to internet etc I would like to add that I have used this option before and its not too bad except i would like a bit more security so that not everyone using the computer could be in my account.

Well thanks for listening everyone and I await your reply on this idea.
Daniel