Tobias Limmer’s research while affiliated with Siemens and other places

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Publications (4)


How Context Impacts Vulnerability Severity: An Analysis of Product-Specific CVSS Scores
  • Conference Paper

December 2024

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8 Reads

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1 Citation

Lucas Senos Coutinho

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Daniel Menasche

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Lucas Miranda

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[...]

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Tobias Limmer


‘State of the Union’: Evaluating Open Source Zero Trust Components

October 2023

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40 Reads

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1 Citation

Lecture Notes in Computer Science

Zero Trust Architecture (ZTA) is a security model based on the principle “never trust, always verify”. In such a system, trust must be established for both the user and the device for access to be granted. While industry adoption of commercial ZTA solutions is accelerating, the state of open-source implementations has yet to be explored. To that end, we survey open-source implementations of zero trust components and put forward a set of ZTA specific requirements to evaluate against. We also identify seven major challenges that hinder the adoption and deployment of open-source zero trust solutions. Our results show that implementations for individual components are much more mature compared to “all-in-one” ZTA solutions. The interoperability between solutions and the development of inter-component protocols are the main areas in which improvements can be made. Despite encouraging developments, we conclude that building ZTAs on top of open-source components is difficult.