Umut Topkara

29 papers A* 2A 3B 2Misc 1Journal 12Unranked 8
YearRankTypeTitle / Venue / Authors
2020 A* conf
Human Distinguishable Visual Key Fingerprints.
USENIX Security Symposium
Mozhgan Azimpourkivi, Umut Topkara, Bogdan Carbunar
2017 A conf
A Secure Mobile Authentication Alternative to Biometrics.
ACSAC
Mozhgan Azimpourkivi, Umut Topkara, Bogdan Carbunar
2017 J jnl
A Secure Mobile Authentication Alternative to Biometrics.
CoRR
Mozhgan Azimpourkivi, Umut Topkara, Bogdan Carbunar
2017 J jnl
Camera Based Two Factor Authentication Through Mobile and Wearable Devices.
CoRR
Mozhgan Azimpourkivi, Umut Topkara, Bogdan Carbunar
2017 J jnl
Camera Based Two Factor Authentication Through Mobile and Wearable Devices.
Proc. ACM Interact. Mob. Wearable Ubiquitous Technol.
Mozhgan Azimpourkivi, Umut Topkara, Bogdan Carbunar
2017 J jnl
Secure Management of Low Power Fitness Trackers.
CoRR
Mahmudur Rahman, Bogdan Carbunar, Umut Topkara
2017 J jnl
Video Liveness for Citizen Journalism: Attacks and Defenses.
CoRR
Mahmudur Rahman, Mozhgan Azimpourkivi, Umut Topkara, Bogdan Carbunar
2017 J jnl
Video Liveness for Citizen Journalism: Attacks and Defenses.
IEEE Trans. Mob. Comput.
Mahmudur Rahman, Mozhgan Azimpourkivi, Umut Topkara, Bogdan Carbunar
2016 J jnl
Movee: Video Liveness Verification for Mobile Devices Using Built-In Motion Sensors.
IEEE Trans. Mob. Comput.
Mahmudur Rahman, Umut Topkara, Bogdan Carbunar
2016 J jnl
Secure Management of Low Power Fitness Trackers.
IEEE Trans. Mob. Comput.
Mahmudur Rahman, Bogdan Carbunar, Umut Topkara
2015 J jnl
Enabling Multiple QR Codes in Close Proximity.
CoRR
Mercan Topkara, Thomas Erickson, Umut Topkara, Chandrasekhar Narayanaswami
2015 — conf
Liveness verifications for citizen journalism videos.
WISEC
Mahmudur Rahman, Mozhgan Azimpourkivi, Umut Topkara, Bogdan Carbunar
2014 B conf
SensCrypt: A Secure Protocol for Managing Low Power Fitness Trackers.
ICNP
Mahmudur Rahman, Bogdan Carbunar, Umut Topkara
2013 J jnl
Runtime adaptive multi-factor authentication for mobile devices.
IBM J. Res. Dev.
Paul C. Castro, Joe W. Ligman, Marco Pistoia, John Ponzo, Gegi Thomas, Umut Topkara
2013 A conf
Seeing is not believing: visual verifications through liveness analysis using mobile devices.
ACSAC
Mahmudur Rahman, Umut Topkara, Bogdan Carbunar
2011 — conf
ACE-Cost: Acquisition Cost Efficient Classifier by Hybrid Decision Tree with Local SVM Leaves.
MLDM
Liyun Li, Umut Topkara, Nasir D. Memon
2009 A* conf
CoCoST: A Computational Cost Efficient Classifier.
ICDM
Liyun Li, Umut Topkara, Baris Coskun, Nasir D. Memon
2007 — conf
Information hiding through errors: a confusing approach.
Security, Steganography, and Watermarking of Multimedia Contents
Mercan Topkara, Umut Topkara, Mikhail J. Atallah
2007 — —
Information security applications of natural language processing techniques
Umut Topkara
2007 Misc conf
Passwords decay, words endure: secure and re-usable multiple password mnemonics.
SAC
Umut Topkara, Mikhail J. Atallah, Mercan Topkara
2007 — conf
Passwords for Everyone: Secure Mnemonic-based Accessible Authentication.
USENIX ATC
Umut Topkara, Mercan Topkara, Mikhail J. Atallah
2006 — conf
Attacks on lexical natural language steganography systems.
Security, Steganography, and Watermarking of Multimedia Contents
Cüneyt M. Taskiran, Umut Topkara, Mercan Topkara, Edward J. Delp
2006 J jnl
Inferring functional information from domain co-evolution.
Bioinform.
Yohan Kim, Mehmet Koyutürk, Umut Topkara, Ananth Grama, Shankar Subramaniam
2006 J jnl
Pairwise Alignment of Protein Interaction Networks.
J. Comput. Biol.
Mehmet Koyutürk, Yohan Kim, Umut Topkara, Shankar Subramaniam, Wojciech Szpankowski, Ananth Grama
2006 — conf
The hiding virtues of ambiguity: quantifiably resilient watermarking of natural language text through synonym substitutions.
MM&Sec
Umut Topkara, Mercan Topkara, Mikhail J. Atallah
2005 A conf
Have the cake and eat it too - Infusing usability into text-password based authentication systems.
ACSAC
Sundararaman Jeyaraman, Umut Topkara
2004 — conf
A hierarchical protocol for increasing the stealthiness of steganographic methods.
MM&Sec
Mercan Topkara, Umut Topkara, Mikhail J. Atallah, Cüneyt M. Taskiran, Eugene T. Lin, Edward J. Delp
2002 — conf
Natural Language Watermarking and Tamperproofing.
Information Hiding
Mikhail J. Atallah, Victor Raskin, Christian Hempelmann, Mercan Karahan, Radu Sion, Umut Topkara, Katrina E. Triezenberg
2002 B conf
Towards Universal Speech Recognition.
ICMI
Zhirong Wang, Umut Topkara, Tanja Schultz, Alex Waibel