AS57821 up and running

Just yesterday AS57821 announced its first prefixes and today RIPE Stats says the prefixes are visible to almost the entire Internet. Hooray! Today, in the evening, I will fly to Frankfurt setting up a wire to the nearest IX and start peering.

SSL/TLS and the BEAST attack

This talk is about the history, the design goals, and the protocol stack of SSL/TLS. It also covers the BEAST attack on cipher block chaining and how the attack is prevented in later versions of TLS. I gave the talk during a cryptology lecture. You can grab the slides here.


One cold and sleepless night in January I thought about purchasing a branded coat from the University’s merchandising shop. I ended up having full access to the database. By accident, I promise! I gave the talk as a just-in-time real-life example during the IT-Security lecture. You can grab the slides here.