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.


Upcoming Events

There are no upcoming CTF events at the moment.

However, feel free to join our next monthly meetup!


Mailing List

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


Subscribe to sigflag-announce


Train your hacking skills

We recently hosted an IT Security Workshop. Subscribe to our mailing list to stay informed about upcoming workshops.


Become a Hacker

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