David Rupprecht
Co-Founder CEO at Ruhr-Universität Bochum
Bochum, North Rhine-Westphalia, Germany
Summary
👤
Senior🎓
Top SchoolDavid Rupprecht is a mobile-network security expert, entrepreneur and PhD researcher with a decade of experience uncovering and fixing critical vulnerabilities in 4G/5G systems. As co-founder and CEO of Radix Security (Montsecure), he is focused on scaling practical security for the emerging wave of 5G campus networks, translating standards-level research into deployable products. His academic work at Ruhr-Universität Bochum exposed systemic misconfigurations and implementation flaws in commercial networks, and his hands-on contributions to the widely used srsRAN open-source 4G suite include low-level MAC fixes and GTP-U enhancements. Comfortable moving between low-level protocol engineering and startup leadership, he combines deep telecommunications expertise with a pragmatic drive to make mobile communications both innovative and secure.
10 years of coding experience
Bachelor's degree, Telekommunikationsinformatik, Bachelor's degree, Telekommunikationsinformatik at Hochschule für Telekommunikation Leipzig (HfTL)Master, IT-Sicherheit Netze/Systeme, Master, IT-Sicherheit Netze/Systeme at Ruhr-Universität Bochum
Github Skills (5)
c-language10
cprogramming-language10
sctp9
debug9
debugging9
Programming languages (6)
Github contributions (5)
srsran/srsRAN_4G
Jan 2018 - Jun 2022
Open source SDR 4G software suite from Software Radio Systems (SRS) https://docs.srsran.com/projects/4g
Role in this project:
Back-end Developer
Back-end DeveloperContributions:215 commits, 25 PRs, 20 comments in 4 years 5 months
Contributions summary:David's contributions focused on the implementation of low-level 4G software suite functions. They implemented several MAC fixes, especially in srsenb/src/mac/mac.cc. The user made the MCC and MNC configurable within the HSS component, and also added debugging and synchronization features. They also added the implementation of PDU Session header parsing within GTPU.
ltertlsdrsrssoftware-defined-radiosrsenb
davidrupprecht/alter_attack_web
Oct 2018 - Dec 2022
Contributions:9 pushes, 1 branch in 4 years 2 months
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