FaceNiff is an Android application that allows you to smell and intercept profiles of web session through the WiFi that your mobile phone is connected to. It is possible to hijack sessions only when WiFi is not using EAP, but it should work on any private networks .
Your Facebook account is at risk, just like a Firesheep (for firefox hacking) there is a FaceNiff for hijacking the session of famous social networking websites includes facebook and twitter.
FaceNiff is developed by Bartosz Ponurkiewicz who created Firesheep before but faceniff is for android OS.
FaceNiff supports following services:
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