Originally Posted by PiTT
I emailed the developer of Widget Locker since he seems to be fiddling with the Finger Print Scanner on the Atrix to see if he's interested in making a separate app for this.
And here I am! (Sorry for taking some time to get back to this)
What I'm doing from WidgetLocker is piggy backing on the system security, so I don't interface with the fingerprint scanner directly. However I have looked into this as it could be interesting for WidgetLocker to be able to use in more ways, and potentially another separate app like discussed here.
I've seen the other thread about the password keeper and this one about an app-lock type thing. The issue with a password keeper is that the passwords should be stored encrypted, otherwise if someone stole your phone they'd just need to root if (if it's not already) and they'd be able to get all your password. But encrypting the passwords with a key that's stored somewhere is really just adding a few extra steps, they're not truly protected. Normally they'd be encrypted with your password, and only decryptable with you typing the password again. But I don't think this could be done for the fingerprint scanner due to what information is available (And how the fingerprint information is stored on disk). I could be wrong however.
As for the app-locker thing, there are also security issues here, but I think app-lockers are more used as a deterrent than as real security. To lock out your friend rather than a thief. But there's a fair amount of non-fingerprint related work to be done for this kind of app as well.
If I do end up doing anything with it I'll post back.