I’m a Lead Data Scientist on the Security Engineering team at Visa Inc. My interests include digital payments, security/privacy issues involving human-computer interaction, privacy on the Internet, information leakage in distributed systems, and side channel attacks. I also try to leverage brain-inspired computer architectures to solve computationally hard problems.

Previously, I was an Assistant Professor of Computer Science at the Naval Postgraduate School in Monterey, CA. Before that, I was a Computer Scientist at the U.S. Army Research Laboratory (ARL) at Aberdeen Proving Ground, MD, working on keylogging side channel attacks and neuromorphic computing.

See my bio, curriculum vitae, research statement, and teaching statement.


Old news

See also old press.


See Calhoun for a list of theses I advised.



Select publications

See the full list and Google Scholar.