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Optimizing Certificate Validation in OT Environments

Authors:
Steffen Fries
Rainer Falk
Andreas Guettinger

Keywords: credential; digital certificate; public-key infrastructure; device authentication, industrial security; power system automation.

Abstract:
User authentication based on digital certificates is becoming more and more common in industrial environments, also known as Operational Technology (OT). Users may be both human users, as well as technical users like devices or applications. Common to all types of certificate-based authentication is that a certificate must be validated before trusting it. This poses a significant effort on the involved devices concerning compute power, memory, and the complexity of the required validation logic. Different approaches already exist to offload certificate validation from specifically constrained end entities. To increase overall efficiency even more, this paper proposes an optimization for infrastructures supporting offloading certificate validation.

Pages: 1 to 5

Copyright: Copyright (c) IARIA, 2025

Publication date: October 26, 2025

Published in: conference

ISSN: 2162-2116

ISBN: 978-1-68558-306-4

Location: Barcelona, Spain

Dates: from October 26, 2025 to October 30, 2025