- My work focuses on building (and attacking!) secure systems that users rely on for privacy and autonomy. Users face many threats online today, from 'Big Data'-mining companies that wish to collect and model our online behaviors, to organized criminals that seek financial gain, to even state-level actors and governments that want to control or surveil the communication of their citizens. While there are many tools built to address parts of these and other threats, the game is not over: evolving technologies and increasingly connected devices present new opportunities for attackers to exploit. By studying existing tools and new systems as they emerge, we can help protect users from these threats.