Welcome to SIGFLAG

SIGFLAG is a CTF team based in Linz, organised by motivated students of JKU Linz.

We regularly participate in Attack-Defense security competitions.


Since we clearly prefer computer viruses over real viruses like COVID-19, our workshop will be POSTPONED to an yet unknown date!

Registrations are still open, so you can reserve your seat in the meantime. We will send you an e-mail and let you confirm your registration again as soon as the new date is fixed.

Stay safe and see you soon!

Become a Hacker

Upcoming CTF Events

Plaid CTF 2020 17 April 2020 23:00


Mailing List

If you would like to receive updates about our meetups, upcoming CTF events (1-2 mails per semester), and internal training and workshop sessions (irregularly) you should subscribe to the announcement mailing list sigflag-announce@jku.at.


Subscribe to sigflag-announce

For other inqueries, please contact info ~ at ~ sigflag.at