Photo: Stephen Chong

Stephen Chong

Gordon McKay Professor of Computer Science
Harvard John A. Paulson School of Engineering and Applied Sciences

Office: 145 Maxwell Dworkin Hall
Office hours: See below
More contact details...

Research Interests

My research helps programmers write trustworthy programs. My primary area of interest is language-based information security: using programming language techniques to provide information security assurance. You can find out more about my research in this research statement (from August 2015).

Recent publications

Co-Director of Undergraduate Studies

I am the co-Director of Undergraduate Studies (co-DUS) for Harvard Computer Science, with Boaz Barak. For DUS-related issues, please email , which goes to all Computer Science DUSes.

Information about the Harvard SEAS undergraduate program in Computer Science is available at This website answers a lot of common questions, and has links to forms.

DUS Office hours (in Maxwell Dworkin 145): My office hours for the next two weeks are:

My DUS office hours are drop-in individual meetings. No appointment is necessary. For course office hours, please see the relevant course web page.

If you are unable to attend my office hours, or have an urgent matter, you are welcome to email me to arrange an appointment. You can also try co-DUS Prof Barak's office hours.


In Fall 2019 I am teaching CS153: Compilers.

Previous courses:

Prospective students

Information for (undergraduate and graduate) students that are interested in joining my research group can be found here. Please read this page before contacting me. General information for Harvard undergraduates interested in research in Computer Science is available here.


  • Computing Over Distributed Sensitive Data Achieve many benefits of data sharing without data owners having to share the data.
  • Privacy Tools for Sharing Research Data Enhance technologies and policies to protect personal data used in research studies.
  • Previous projects
    • Shill: a secure shell scripting language.
    • Accrue Providing language-based security guarantees proportional to programmer effort.
    • CHILI Enabling the execution of code of unknown origin while guaranteeing that the code is not vulnerable to various classes of security attacks.



Professional activities


My research is currently supported by the National Science Foundation (under Award 1565387), the AFOSR, DARPA (BRASS and CHESS programs), and a Google Faculty Research Award. I have previously been supported by IARPA, an Alfred P. Sloan Research Fellowship, and NSF Awards 1054172, 1551249, 1237235, 1421770, 1524052.

Brief bio

(Bio suitable for talk announcements, etc.)

I completed a Ph.D. at Cornell University in August 2008, under the guidance of Andrew Myers. Prior to graduate school, I spent several years working as a consultant and contractor. I received a B.Sc.(Hons) and B.A. from Victoria University of Wellington, in Wellington, New Zealand. My wife, Kiran Gajwani, is a Lecturer/Advisor in the Economics Department at Harvard.