If you like to use the patter lock on Android, you will probably like the picture passwords on a Windows 8 tablet. Instead of a 3x3 box of dots to connect in your chosen pattern, you take a photo and connect noses/elbows/clouds/whatever in a set pattern that you chose. You can do things such as circle a face, then draw a line from foot to hand, for example. I've never sat down and tried to figure out someone else's lock pattern, but I would imagine it would be reasonably secure. There are always smudges that could give you away, I suppose, if you don't maniacally clean your screens the way I do.
Answer
If you like to use the patter lock on Android, you will probably like the picture passwords on a Windows 8 tablet. Instead of a 3x3 box of dots to connect in your chosen pattern, you take a photo and connect noses/elbows/clouds/whatever in a set pattern that you chose. You can do things such as circle a face, then draw a line from foot to hand, for example. I've never sat down and tried to figure out someone else's lock pattern, but I would imagine it would be reasonably secure. There are always smudges that could give you away, I suppose, if you don't maniacally clean your screens the way I do.