The Information Flow Control Challenge consists of 10 challenges to leak the secret in the face of increasingly hardened information flow control mechanisms.
Start the IFC Challenge
The IFC challenge is developed by Andrei Sabelfeld's research group at the Department of Computer Science and Engineering, Chalmers University of Technology, Gothenburg, Sweden.
- Andrei Sabelfeld
- Benjamin Eriksson
- Arnar Birgisson
"The IFC challenge is a wonderful way of getting
students to think about information leakage and type
systems. I have been using it for teaching security
both at University of Rennes and University of
Copenhagen and it has always been very much
appreciated. Cheers to the Chalmers group for sharing
this entertaining and pedagogical tool with the
- Thomas Jensen, INRIA
"The IFC Challenge is a great way to help students understand the ins and out
of information flow control, while having fun. By presenting increasingly
complex languages and flawed type systems for information flow control, the
challenge allows students to appreciate formalisms by asking them to identify
practical attacks. The IFC Challenge is an important part of the language-based
security module of my course, which students largely enjoy."
- Stefano Calzavara, Università Ca' Foscari Venezia
"We offer a Software Security course that covers
software vulnerabilities and language based design of
tools for building security into software. It brings in
theoretical foundations of information flow, and we
strive to integrate hands-on exercises that help tie
these concepts with practical needs in security. We’ve
been using the IFC Challenge for several years now, and
this class is always a great hit. The students find
excitement in understanding the intricacies of
information flow dependencies and type based ways of
stopping them. It also helps see that the same
principles that hold for a toy language can also be
applied to real world languages. Thank you for making
- Ana Almeida Matos, Instituto Superior Técnico, Lisbon
"The IFC challenge is an excellent pedagogical tool for
quickly building intuition about threat models and
covert channels. I use it regularly in my teaching, and
students find it valuable and fun!"
- Aslan Askarov, Aarhus University
"These challenges combine theory and practice very
naturally. A powerful pedagogical tool to boost
students' interest in information flow control."
- Musard Balliu, KTH Royal Institute of Technology"
We are thankful to several people for their contributions, feedback, and bug reports: Mohammad M. Ahmadpanah, Stefano Calzavara, Pontus Eriksson, Oscar Evertsson, Rune T. Fiedler, Jesper Jaxing, Daniel Hedin, Alexander Sjösten, Terkel K. Tolstrup