LEARN computer security offense and defense in hands-on seminars taught by computer security experts from MIT, Lincoln Laboratory, and Northeastern University.


HACK mobile applications and back-end services to fix bugs (and keep your applications running) or exploit them (and destroy your competition).


WIN cash prizes, an MIT/LL CTF flag, and bragging rights!


MITLLCTF Announcements's blog

FAQ page updated

Please take a look at the FAQ page for some clarifications on flag stealing and attacking the game infrastructure.

Materials from Security Boot Camp posted

If you couldn't make the Security Boot Camp in person this weekend, please see the Schedule page for notes, demo code, and further reading.

Reminder: Security Boot Camp this Saturday, 1-5pm!

Please see the Schedule page for event information and location.

Scrimmage details

10/12: Scrimmage


MIT/LL CTF Scrimmage is aimed at giving players an opportunity to familiarize themselves with the MIT/LL CTF environment, as well as help us test our infrastructure. Remote participation is possible for this event; please let us know if your team expects to participate remotely.

Participation in the scrimmage is optional; no prizes or points will be awarded during this event.


MIT campus, room 26-152

Team formation deadline: Thursday, October 10 @ 11:59pm

If you are on a team and that team has 6 or more people, you can stop reading this post. You are in good shape.

If you are not on a team or the team you are on has fewer than 6 people, please continue reading. You are not in good shape. We need you on to be on a team, and we need the teams to be at least 6 members. So here's the deal.

Deadline: Thursday, Oct 10 @ 11:59pm. Boston time.

What happens shortly after the deadline:

Event schedule and FAQ updates

Event schedule and FAQ have been updated - please take a look! Upcoming events include the MIT/LL CTF Scrimmage on 10/12 and MIT/LL CTF Security Bootcamp on 10/19.

Registration deadline: 11:59pm EDT Friday, October 4, 2013

Due to overwhelming demand and limited space, we regret that we will be closing registration for MIT/LL CTF 2013 as of 11:59pm EDT on October 4. Make sure your team members are registered before this deadline, as we may be forced to bump incomplete teams.

Updates now available via Twitter!

You can now follow @LLCTF on Twitter for MIT/LL CTF-related updates.

Registration now open!

The registration for 2013 MIT/LL CTF is now open. Please register on our scoreboard at http://llctf.mit.edu/register, fill out the survey and form a team!

MIT/LL CTF 2013: Capture the Flag Competition - SAVE THE DATE

We are pleased to let you know that MIT/LL CTF competition will be hosted this year on 7pm EDT Friday, October 25 through 7pm EDT Sunday, October 27, 2013.

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