Umut Topkara

Publication Activity (10 Years)

Years Active: 2002-2020
Publications (10 Years): 12

Top Topics

Human Perceptual

Factor Authentication

Top Venues

IEEE Trans. Mob. Comput.

Publications

Mozhgan Azimpourkivi, Umut Topkara, Bogdan Carbunar
Human Distinguishable Visual Key Fingerprints. USENIX Security Symposium (2020)
Mahmudur Rahman, Mozhgan Azimpourkivi, Umut Topkara, Bogdan Carbunar
Video Liveness for Citizen Journalism: Attacks and Defenses. IEEE Trans. Mob. Comput. 16 (11) (2017)
Mozhgan Azimpourkivi, Umut Topkara, Bogdan Carbunar
A Secure Mobile Authentication Alternative to Biometrics. ACSAC (2017)
Mozhgan Azimpourkivi, Umut Topkara, Bogdan Carbunar
Camera Based Two Factor Authentication Through Mobile and Wearable Devices. CoRR (2017)
Mozhgan Azimpourkivi, Umut Topkara, Bogdan Carbunar
Camera Based Two Factor Authentication Through Mobile and Wearable Devices. Proc. ACM Interact. Mob. Wearable Ubiquitous Technol. 1 (3) (2017)
Mahmudur Rahman, Bogdan Carbunar, Umut Topkara
Secure Management of Low Power Fitness Trackers. CoRR (2017)
Mahmudur Rahman, Mozhgan Azimpourkivi, Umut Topkara, Bogdan Carbunar
Video Liveness for Citizen Journalism: Attacks and Defenses. CoRR (2017)
Mozhgan Azimpourkivi, Umut Topkara, Bogdan Carbunar
A Secure Mobile Authentication Alternative to Biometrics. CoRR (2017)
Mahmudur Rahman, Umut Topkara, Bogdan Carbunar
Movee: Video Liveness Verification for Mobile Devices Using Built-In Motion Sensors. IEEE Trans. Mob. Comput. 15 (5) (2016)
Mahmudur Rahman, Bogdan Carbunar, Umut Topkara
Secure Management of Low Power Fitness Trackers. IEEE Trans. Mob. Comput. 15 (2) (2016)
Mercan Topkara, Thomas Erickson, Umut Topkara, Chandrasekhar Narayanaswami
Enabling Multiple QR Codes in Close Proximity. CoRR (2015)
Mahmudur Rahman, Mozhgan Azimpourkivi, Umut Topkara, Bogdan Carbunar
Liveness verifications for citizen journalism videos. WISEC (2015)
Mahmudur Rahman, Bogdan Carbunar, Umut Topkara
SensCrypt: A Secure Protocol for Managing Low Power Fitness Trackers. ICNP (2014)
Paul C. Castro, Joe W. Ligman, Marco Pistoia, John Ponzo, Gegi Thomas, Umut Topkara
Runtime adaptive multi-factor authentication for mobile devices. IBM J. Res. Dev. 57 (6) (2013)
Mahmudur Rahman, Umut Topkara, Bogdan Carbunar
Seeing is not believing: visual verifications through liveness analysis using mobile devices. ACSAC (2013)
Liyun Li, Umut Topkara, Nasir D. Memon
ACE-Cost: Acquisition Cost Efficient Classifier by Hybrid Decision Tree with Local SVM Leaves. MLDM (2011)
Liyun Li, Umut Topkara, Baris Coskun, Nasir D. Memon
CoCoST: A Computational Cost Efficient Classifier. ICDM (2009)
Umut Topkara, Mikhail J. Atallah, Mercan Topkara
Passwords decay, words endure: secure and re-usable multiple password mnemonics. SAC (2007)
Umut Topkara, Mercan Topkara, Mikhail J. Atallah
Passwords for Everyone: Secure Mnemonic-based Accessible Authentication. USENIX Annual Technical Conference (2007)
Mercan Topkara, Umut Topkara, Mikhail J. Atallah
Information hiding through errors: a confusing approach. Security, Steganography, and Watermarking of Multimedia Contents (2007)
Cüneyt M. Taskiran, Umut Topkara, Mercan Topkara, Edward J. Delp
Attacks on lexical natural language steganography systems. Security, Steganography, and Watermarking of Multimedia Contents (2006)
Mehmet Koyutürk, Yohan Kim, Umut Topkara, Shankar Subramaniam, Wojciech Szpankowski, Ananth Grama
Pairwise Alignment of Protein Interaction Networks. J. Comput. Biol. 13 (2) (2006)
Yohan Kim, Mehmet Koyutürk, Umut Topkara, Ananth Grama, Shankar Subramaniam
Inferring functional information from domain co-evolution. Bioinform. 22 (1) (2006)
Umut Topkara, Mercan Topkara, Mikhail J. Atallah
The hiding virtues of ambiguity: quantifiably resilient watermarking of natural language text through synonym substitutions. MM&Sec (2006)
Sundararaman Jeyaraman, Umut Topkara
Have the cake and eat it too - Infusing usability into text-password based authentication systems. ACSAC (2005)
Mercan Topkara, Umut Topkara, Mikhail J. Atallah, Cüneyt M. Taskiran, Eugene T. Lin, Edward J. Delp
A hierarchical protocol for increasing the stealthiness of steganographic methods. MM&Sec (2004)
Mikhail J. Atallah, Victor Raskin, Christian Hempelmann, Mercan Karahan, Radu Sion, Umut Topkara, Katrina E. Triezenberg
Natural Language Watermarking and Tamperproofing. Information Hiding (2002)
Zhirong Wang, Umut Topkara, Tanja Schultz, Alex Waibel
Towards Universal Speech Recognition. ICMI (2002)