I completed my PhD in May 2012 with the Security Group of the University of Cambridge Computer Laboratory, supervised by Professor Ross Anderson and funded as a Gates Cambridge Scholar. My PhD thesis is on analysing human-chosen distributions of secrets, specifically passwords and PINs.
My complete publications list is online. I focused on authentication, web security and privacy but have also researched side-channel cryptanalysis, protocol verification, software obfuscation, voting, and privacy in social networks.
More (somewhat out of date) information is available on my personal homepage.