Centralised internet is not good. We saw that AGAIN this week with @cloudflare.social outages.

We looked into @reconwave.com data and checked how much is DNS centralised. Turns out 1/3 of all domains are managed by two providers.

Blogpost by @rozumbrada.bsky.social reconwave.com/blog/post/dn...

Welcome Recon Wave as an organizing partner of the Honeynet Project Workshop 2025 in Prague! Recon Wave is a powerful attack surface monitoring platform that requires no installation or internal access.

📅 June 2–4, 2025
📍 NTK, Prague
🔗 prague2025.honeynet.org

#Honeynet2025

Speaking on @bsidesprg.bsky.social with @rozumbrada.bsky.social today!

We officially closed the first edition of our Introduction to Security class as a Massive Open Online Course! After an incredible semester, the results are in, and we couldn’t be more thrilled! Read more 👇👇👇👇
www.aic.fel.cvut.cz/news/cyberse...

As we're wrapping up our Cyber Security course at fel.cvut.cz we're sorting through the feedback and there's so much love coming from our students!

Looking forward to the next year!

My latest work has been published:

"CTU Hornet 65 Niner: A network dataset of geographically distributed low-interaction honeypots"

The dataset has a unique value for studying the nature of Internet attacks over time and their changes and characteristics.

www.sciencedirect.com/science/arti...

Quiz time: can you think of a single legit reason to put RSA private keys to DNS TXT records? Sounds like a nonsense but people really do that

We did a small research on this topic some time ago

What has Stratosphere been up to? You can find out in the second edition of our newsletter! Grab a cup of your favorite warm beverage and enjoy the read!🧉

www.linkedin.com/pulse/strato...

Hello World 🦋!

I'm on this picture and I don't like it.