In a paper the Pico team are about to present at the Passwords 2014 conference in Trondheim, we introduce our proposal for Password Manager Friendly (PMF) semantics. PMF semantics are designed to give developers and maintainers of password managers a bit of a break and, more importantly, to improve the user experience.

For the details of the PMF proposal please read my post Why password managers (sometimes) fail on the Lightbluetouchpaper blog (the blog of the Security research group at the University of Cambridge).