Jason Polakis is a Postdoctoral Research Scientist in the Department of Computer Science at Columbia University. He is broadly interested in identifying the security and privacy limitations of Internet technologies, designing robust defenses and privacy-preserving techniques, and enhancing our understanding of the online ecosystem and its threats. His research has revealed significant flaws in popular services, and major vendors have deployed his proposed defenses. His work has been published in top tier security conferences (Security and Privacy, CCS, and NDSS) as well as other top tier computer science conferences (WWW).