| 2017 | ACSAC | A Secure Mobile Authentication Alternative to Biometrics. | Mozhgan Azimpourkivi, Umut Topkara, Bogdan Carbunar |
| 2014 | ICNP | SensCrypt: A Secure Protocol for Managing Low Power Fitness Trackers. | Mahmudur Rahman, Bogdan Carbunar, Umut Topkara |
| 2013 | ACSAC | Seeing is not believing: visual verifications through liveness analysis using mobile devices. | Mahmudur Rahman, Umut Topkara, Bogdan Carbunar |
| 2009 | ICDM | CoCoST: A Computational Cost Efficient Classifier. | Liyun Li, Umut Topkara, Baris Coskun, Nasir D. Memon |
| 2007 | SAC | Passwords decay, words endure: secure and re-usable multiple password mnemonics. | Umut Topkara, Mikhail J. Atallah, Mercan Topkara |
| 2007 | USENIX | Passwords for Everyone: Secure Mnemonic-based Accessible Authentication. | Umut Topkara, Mercan Topkara, Mikhail J. Atallah |
| 2005 | ACSAC | Have the cake and eat it too - Infusing usability into text-password based authentication systems. | Sundararaman Jeyaraman, Umut Topkara |
| 2002 | ICMI | Towards Universal Speech Recognition. | Zhirong Wang, Umut Topkara, Tanja Schultz, Alex Waibel |