Adaptive security: Certificate and key rotation for firmware integrity
Abstract
This paper explores various device architectures designed to support key rotation, a critical process given the common issue of lost signing keys. Implementing key rotation in Industrial Internet of Things (IIoT) devices presents unique challenges, largely due to the limited resources available during secure boot and the restrictions imposed by firmware tools provided by chip manufacturers. The goal of this work is to offer a practical viewpoint on these challenges and the associated trade-offs, aiming to engage chip vendors and the wider community in a constructive discussion.
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