Want to join our CTF team?

Recruitment has ended for Spring 2019. Come back next year!
You can find the solutions to past challenges on our write-ups page.
Challenges will remain open until the beginning of the Spring 2019 semester.

Capture the Flag (CTF) is a special kind of information security (hacking) competitions. Jeopardy-style CTFs have a couple of questions (tasks) in range of categories. For example, Web, Forensic, Crypto, Binary or something else. Team can gain some points for every solved task. More points for more complicated tasks usually. Each task is vulnerable in some way. Your goal is to exploit this vulnerability and in doing so you will find the "flag." For the challenges below, the flags are of the form CHC{...}. For example, a given flag could look like CHC{1_4m_4_fl46}.


Apparently a CHC interview costs $100k.
Maybe you can get it cheaper?

Website Resources


Start Here!


I got the strangest phone call.
Any idea what they're saying?

Download Resources


I left my key lying around somewhere.
Can you git it for me?