Droidsheep For PcFaceniff For WindowsFaceNiff is an Android application that, much like the Firefox add-on Firesheep, can hijack unencrypted Facebook, Twitter, and even Amazon credentials from other users on the same Wi-Fi network. Unlike Firesheep, FaceNiff also works on encrypted networks (though you will still need to be on the network for the app to work).The app only works on rooted devices..