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jaseg 2025-12-01 15:01:28 +01:00
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@ -120,7 +120,7 @@ extensive use of tamper-indicating enclosures and of seals\footnote{
bottom of a borehole that has been back-filled with concrete such that any attempt to reach the sensor would be
well-visible in the sensor's own readings~\cite{simmonsHowInsureThat1988}.
}. In both systems, the approach taken is that the enclosure or seal is treated similarly to what these days, in
computing we call a Physically Unclonable Function (PUF). The concept of a PUF centers on electronic component
computing we call a Physical Unclonable Function (PUF). The concept of a PUF centers on electronic component
manufactured such that random manufacturing variations can later be measured by the finished circuit. The core idea is
that since these manufacturing variations are random, they can be used as a source for cryptographic entropy.
Furthermore, the concept is based on the assumption that these manufacturing variations cannot be controlled, hence