Stephen Chong

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

Office: 145 Maxwell Dworkin Hall
Office hours: (most) Tuesdays 1:30pm-2:30pm. Also by appointment.
More contact details...

Photo: Stephen Chong

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).

Selected materials from my tenure packet can be found here.

Recent publications


In Fall 2015 I am teaching CS 252, a graduate seminar on programming languages. This incarnation will focus on (static and dynamic) program analysis.

Previous courses:


  • Accrue Providing language-based security guarantees proportional to programmer effort.
  • Privacy Tools for Sharing Research Data Enhance technologies and policies to protect personal data used in research studies.
  • Shill: a secure shell scripting language.
  • Previous projects
    • CHILI Enabling the execution of code of unknown origin while guaranteeing that the code is not vulnerable to various classes of security attacks.


  • Previous
    • Louis Li (undergrad, now at Google)
    • Jo Booth (undergrad, now at Google)
    • Ling-Ya Chao (undergrad)
    • Jeff Vaughan (post doc, now at Google)
    • Stefan Muller (undergrad, now grad student at CMU)
    • Evan Czaplicki (undergrad, now at Prezi)
    • Anna Gommerstadt (undergrad, now grad student at CMU)
    • Dan Bradley (undergrad)
    • Aslan Askarov (post doc, now at Aarhus University)


Professional activities

Prospective students

Information for prospective students, both undergraduate and graduate, can be found here. General information for Harvard undergraduates interested in research in Computer Science is available here.


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

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.