Podcast: Chat Control Under Fire - Prof. Bart Preneel on Privacy, Encryption & European Surveillance

Mon, 25 May 2026 10:00:00 +0200

The Episode

Note: This podcast episode was recorded and conducted in Dutch.

For the Howest Student IT Podcast, my colleague Gianni De Jaeger and I recorded an episode with Professor Bart Preneel, head of the COSIC research group at KU Leuven and one of Europe’s leading experts in cryptography and cybersecurity.

You can listen to the episode on Spotify via the Howest Student IT Podcast.

What We Talked About

The central topic was the European “Chat Control” legislation, a proposed EU regulation that would require messaging platforms to automatically scan all private messages for illegal content, including end-to-end encrypted communications.

We covered:

What Chat Control actually proposes and how it works technically
Why breaking or bypassing end-to-end encryption is fundamentally dangerous, even with good intentions
The open letter signed by more than 400 researchers warning against the risks of mass digital surveillance
What the difference is between lawful interception and what Chat Control would actually implement
How this debate fits into the broader tension between privacy, security, and government oversight in the EU

Why Bart Preneel?

Professor Preneel is not just an academic. He has been actively involved in the policy debate around Chat Control and has spoken publicly about why it poses a serious risk to digital security. Having someone with his level of expertise explain the cryptographic implications in plain language was exactly what this episode needed.

He also made it very clear that this isn’t a debate between “privacy vs. safety”. It’s about whether weakening encryption for everyone actually makes anyone safer. The short answer, according to him and the 400+ signatories of the open letter: it doesn’t.

My Reflection

This was one of the most interesting things I’ve done in the Professional Networking module. Going in, I knew the basics of end-to-end encryption and had a rough idea of what Chat Control was, but talking to an actual expert forced me to really understand the details, because you can’t ask good questions without understanding the subject.

A few things that stuck with me:

The scale of the open letter (400+ researchers!) shows how seriously the academic community takes this threat.
The fact that Belgium has been one of the more resistant countries to Chat Control in EU negotiations was something I didn’t know going in.
There’s a difference between “scanning for known hashes of illegal content” and “reading your messages”, but the infrastructure required for the first inevitably enables the second.

Given my focus on cybersecurity, this topic sits right at the intersection of everything I care about: encryption, policy, and the real-world consequences of technical decisions made by non-technical lawmakers.

Would I do another podcast episode? Absolutely. It’s a surprisingly effective way to learn. The format forces you to actually understand something well enough to talk about it for 30+ minutes.y

Encryption on Aaron Deceuninck Portfolio

Podcast: Chat Control Under Fire - Prof. Bart Preneel on Privacy, Encryption & European Surveillance

The Episode

What We Talked About

Why Bart Preneel?

My Reflection