Inkblot passwords
Adam Stubblefield, an intern with Microsoft Research, thought that our ability to tell ourselves unique stories about inkblots might be a secret key to a strong digital lock - the online password. [from research.microsoft.com via kottke.org].

Don't know about inkblots but that bloke with the big thighs and the purple raglan-sleeved tee is not looking like his attempt at the splits will be succeeding any time soon.
And if all that a fresh-faced intern at MS can come up with is a bunch of symetrical images....