29 citations · 44 across the 3 of their papers we have counts for
4 papers
A Secure Mobile Authentication Alternative to Biometrics
Mozhgan Azimpourkivi, Umut Topkara, Bogdan Carbunar
Biometrics are widely used for authentication in consumer devices and business settings as they provide sufficiently strong security, instant verification and convenience for users…
Camera Based Two Factor Authentication Through Mobile and Wearable Devices
Mozhgan Azimpourkivi, Umut Topkara, Bogdan Carbunar
We introduce Pixie, a novel, camera based two factor authentication solution for mobile and wearable devices. A quick and familiar user action of snapping a photo is sufficient for…
Video Liveness for Citizen Journalism: Attacks and Defenses
Mahmudur Rahman, Mozhgan Azimpourkivi, Umut Topkara +1
The impact of citizen journalism raises important video integrity and credibility issues. In this article, we introduce Vamos, the first user transparent video "liveness" verificat…
Spotting Suspicious Reviews via (Quasi-)clique Extraction
Paras Jain, Shang-Tse Chen, Mozhgan Azimpourkivi +2
How to tell if a review is real or fake? What does the underworld of fraudulent reviewing look like? Detecting suspicious reviews has become a major issue for many online services.…