The presentation was titled "Warum ist IT-Sicherheit heute so wichtig? " Katharina talked about practical attacks from the last few years that are known from the press headlines. She then talked about CTF (= Capture the Flag), presented our platform, and showed how to retrieve some of the hidden flags.
The platform is still accessible here: https://herbstuni.upbhack.de
You can also find her slides here. They contain some useful links on how to start learning IT security and hacking.