Learn and improve your hacking skills with CTF challenges

Learn and improve your hacking skills with CTF challenges

Capture The Flag or CTF challenges are IT-security puzzles and competitions to practice (and show off) your hacking skills. The exact format can vary but the goal is always to collect one or more flags. You can compete alone or in teams, online or IRL. It’s all about problem solving within the IT-security realm and typical challenges include:

  • Web and network penetration
  • Reverse-engineering binary data and programs
  • Finding weaknesses in cryptography
  • Performing forensic investigations
  • Attack/Defense battles


In this talk experienced CTF-veteran Zeta Two gives an introduction to the world of CTF. What it is, how to get started and show a live demo of a typical challenge.


This video is a recording of the presentation. The video is hosted on YouTube.


Carl “Zeta Two” Svensson is a security professional and hobbyist currently working as the head of security at Swedish healthcare startup, Kry. He is a frequent CTF player for the Swedish top team HackingForSoju, organizer of Midnight Sun CTF and an active member of the Swedish and international security community with a great fondness for a broad range of topics, reverse engineering being one of his favorites.

Feel free to reach out to Carl on calle.svensson@zeta-two.com and visit his website.


17.30-18.00 Pre-event mingle and snacks
18.00-19.00 Presentation
19.00-20.00 Post-event mingle

Code of Conduct

Please read our Code of Conduct before attending the event.

When and where

When: April 11th, 2019, 17.30 (door closes at 18.00)

Where: Regeringsg. 30, Stockholm. Follow the 0xFF-signs, 4th floor, “Convendum”. OpenStreetMap


The event is free of charge but the number of seats are limited.