Instructor / Research Faculty, CHIP, Harvard Medical School.
Fellow, Center for Research on Computation and Society, Harvard University.

I study, design, and implement technical solutions to public policy problems, in particular security and privacy of health data, web security, and voting systems. I received a PhD from MIT's Cryptography and Information Security Group, where my advisor was Ronald Rivest.



Health Privacy

I'm working to build a privacy-conscious software platform for health data. Privacy is the biggest concern, and careful data sharing is crucial to proper care. [More Soon]

Web Security

BeamAuth: two-factor web authentication with a bookmark. [Read More].

SessionLock: securing web sessions without SSL. [Read More].

Voting

Helios: a web-based, open-audit voting system.

Go try it out, and read the blog.

Semantic Web

I am co-editor and task-force chair for RDFa, an emerging W3C standard for marking up data within HTML web pages.

Read the Primer and blog.


Copyright

I'm a technical advisor to Creative Commons where I work on machine-readable expression of copyright licenses.

Tech Policy

I'm an affiliate of the Berkman Center @ Harvard Law, where I help out with the StopBadware project.

Academic

I am on the Program Committee for IEEE Security & Privacy 2009, WWW2009, and CCS 2008.