Android 4.0, also named Ice Cream sandwich came out with a new phone unlock feature. Rather than unlocking the phone via a pin or password, the front facing camera uses facial recognition software to unlock the phone when it ‘sees’ the correct face.
However it’s been pointed out that holding up another phone to the camera with a picture of the correct person, the phone can be unlocked.
Seems like a cool feature although it seems like it can be easily bypassed. I think a pin or password is still the better route to go. It would be a nice feature better implemented when the software is smart enough to detect when a picture is being held up.
The full article can be found here: http://news.cnet.com/8301-1009_3-57323508-83/digital-image-can-dupe-android-face-based-lock/?tag=txt;title