Joeri De Ruiter
Technical Specialist Security And Privacy at SURF
Arnhem-Nijmegen Region Netherlands
Summary
👤
Senior🎓
Top SchoolJoeri De Ruiter is a technical specialist in security and privacy with a decade of experience designing and analysing real-world security protocols and privacy-friendly systems, currently focusing on DNS, domain registration and digital certificates at SURF. He combines deep academic rigour—from a PhD and postdoctoral research on EMV, TLS and industrial control systems—with hands-on engineering, including firmware for HSMs and back-end contributions to Wireshark that added support for modern wireless security (OWE, SAE, FILS). His background spans research, teaching and applied R&D across universities and industry (SIDN, Radboud, University of Birmingham), enabling him to translate formal analysis into deployable solutions. Colleagues value his ability to engage with stakeholders to define requirements and deliver practical, auditable security designs. A lesser-known strength is his cross-layer fluency: he moves comfortably between protocol specification, implementation, and tooling for protocol analysis.
10 years of coding experience
13 years of employment as a software developer
Master's Degree, Computer Science and Engineering - Information Security Technology, Master's Degree, Computer Science and Engineering - Information Security Technology at Eindhoven University of TechnologyHigh School, Pre-universtity education (gymnasium), High School, Pre-universtity education (gymnasium) at Trevianum Scholengroep Sittard
Dutch, English, German
Github Skills (8)
c1710
proto10
802-1110
c1110
wireshark10
network-protocol10
packet-capture9
tshark8
Programming languages (9)
Github contributions (5)
wireshark/wireshark
Sep 2018 - Oct 2018
Read-only mirror of Wireshark's Git repository at https://gitlab.com/wireshark/wireshark. ⚠️ GitHub won't let us disable pull requests. ⚠️ THEY WILL BE IGNORED HERE ⚠️ Upload them at GitLab instead.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:5 commits in 23 days
Contributions summary:Joeri primarily contributed to the Wireshark project by implementing and extending support for new wireless security protocols and features, focusing on the IEEE 802.11 standard. Their work involved adding dissectors and parsing logic for Opportunistic Wireless Encryption (OWE), SAE (Simultaneous Authentication of Equals) messages, and extending support for FILS (Fast Initial Link Setup) with new tags and authentication methods. The contributions demonstrate a deep understanding of wireless network protocols and protocol analysis within the Wireshark framework.
tsharkgit-repositorywiresharkpacket-capturegitlab
jderuiter/javacard-openpgpcard
Sep 2016 - Sep 2021
Contributions:21 commits, 12 pushes, 3 branches in 5 years 1 month
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