My research group builds computer systems that use cryptography to empower and protect their users. The projects that excite me the most:
Private search. We built the Tiptoe search engine. Using Tiptoe, a client can search the web while hiding all information about its query from the search engine itself.
Private information retrieval. These systems allow a client to query a remote database server while hiding its query from the server. Our work has reduced the computational cost of these schemes using preprocesing and lattice-based cryptography. We have also strengthened the security properties they provide, and applied them to solve practical private-search problems.
Privacy-preserving collection of aggregate statistics. Our Whisper, Poplar, and Prio systems have made it possible to gather user data at large scale in a privacy-protecting way.
Secure authentication. Our Larch, SafetyPin and True2F, systems for authentication that provide strong hardware-backed security protections, while still protecting against a wide class of hardware faults and backdoors.
For more details, please see my full list of publications.
Here is a list of talks I have given. Some have links to the slides and/or videos.
A variety of companies and government agencies fund my group's research. See the "acknowledgements" sections of my papers for details on funding sources.