HackTrinity 2020 is over, thanks to everybody for participating! You can see a recording of our awards and solutions livestream here!


HackTrinity is a beginner-intermediate capture the flag or "CTF" competition for university students, by university students!

What's a CTF? Glad you asked! A CTF is a security or "hacking" competition where contestants solve challenges in categories like Web, Cryptography, Reverse Engineering and Forensics to get "flags". A flag is a short piece of text, a bit like a password, that you find by solving a challenge. For example, if the challenge description provided some text encoded with some sort of cipher, successful decoding would usually result in the flag text.

HackTrinity will start at 12.00 on Monday the 16th of March and run through until 23:59 on Sunday the 22nd. The scoreboard will freeze 2 hours before the end.

Sponsors & Prizes

Without our generous sponsors, HackTrinity wouldn't be happening!

Please note: Although anybody is welcome to participate, only competitors currently attending an Irish (all-island!) university are eligible to win prizes. Be sure to register with your college email address! If a badge with the name of your college doesn't appear next to your username on the users list, DM us on Twitter or send us an email.

Top 3

edgescan have kindly provided our top 3 prizes:

  • €320 1st place
  • €135 2nd place
  • €95 3rd place

Top 20

ZeroDays have provided prizes for the top 20 comptetitors in the form of an Orange Pi Zero LTS mini computer.


Workday have given us funding for the infrastructure needed to host hundreds of instanced challenges!


Registration for HackTrinity is now open! Please read the rules and click the button below to sign up for an account. Please check your spam if the verification email does not arrive in your inbox.

Awards night

Like last year, we'll be holding an awards night for HackTrinity once the competition is over. A brief walkthrough of the challenges will take place in Trinity before heading over to the pub for prizegiving. Date and time TBD.

Follow us for updates!