Author

Jan Schaumann

Jan Schaumann is a Distinguished Infrastructure Security Architect, Adjunct Professor of Computer Science, and Actual Human at "The Internet" with more than 20 years of experience building and securing high-availability services at Internet scale. His broad interests include all areas of information security and the overall health of the internet, as well as the safety and privacy of its users.

https://netmeister.org/

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Bootstrapping HTTP/1.1, HTTP/2, and HTTP/3

By Jan Schaumann on 2 Jul 2025

Guest Post: A packet-level tour through redirects, TLS negotiation, and protocol discovery.

Whose CIDR is it anyway?

By Jan Schaumann on 19 Jul 2024

Guest Post: A look at centralization in the ownership of IP blocks.

Use of HTTPS resource records

By Jan Schaumann on 18 Dec 2023

Guest Post: Measuring HTTPS resource record adoption in the wild.

The gTLDs’ new clothes

By Jan Schaumann on 1 Aug 2023

Guest Post: A look at centralization in naked domains.

Whose certificate is it anyway?

By Jan Schaumann on 28 Jun 2023

Guest Post: How Certification Authority Authorization is used globally.

Who reads your email?

By Jan Schaumann on 5 Apr 2023

Guest Post: Analysing gTLD MX records for centrality.

Who controls the Internet?

By Jan Schaumann on 13 Jan 2023

Guest Post: Measuring the diversity of authoritative NS records in gTLDs.