WhisperCore Deals With Android Smudge Attacks & More

One of Android’s early draws was its gesture lock feature. This let you assign a gesture within a grid on the screen to unlock your phone. Unfortunately, as you can see in the photo of my Droid, it is reasonably easy to guess what the gesture is based on finger oil smudges left on the screen. I gave up using gesture unlocking because I found the process too slow and error prone. However, using a PIN use leaves its own finger oil smudge clues on the numeric keypad matrix.