Re:Will not be enough. (Score 1)

Then there is current research on doing audio-keylogging (by recognizing the individual key-sounds), and that seems to work reasonably well.

We had a project at uni last year where you had to do exactly that. There were 2 teams, one of my friends was in one. It's really not that easy and it doesn't work all that great. The idea is indeed simple, but you get in all sorts of trouble when you press the keys harder or you use a different keyboard or ... Their program recognized about 5-8 keys reliably and even then... Besides, you'd run into trouble in case the password you're trying to steal is actually decent, because how would you know if certain characters are numbers or punctuation symbols? I guess you could see if the shift button was being held, but then you'd also have to see when it wasn't held anymore. There's a lot of problems associated with this kind of "audio"-keylogging and it's certainly tenfold times easier to create a regular keylogger.