Stephen Chong

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

Office: 145 Maxwell Dworkin Hall
More contact details...

Photo: Stephen Chong

Research Interests

My research aims to help programmers write trustworthy programs. My primary area of interest is language-based information security: using programming language techniques to provide information security assurance.

Recent publications


In Fall 2015 I am teaching CS 252, a graduate seminar on programming languages. This incarnation will likely 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 LogicBlox)
    • 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.

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.