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Erschienen in:
2013 | OriginalPaper | Buchkapitel
An Accurate Probabilistic Reliability Model for Silicon PUFs
verfasst von : Roel Maes
Erschienen in: Cryptographic Hardware and Embedded Systems - CHES 2013
Verlag: Springer Berlin Heidelberg
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The power of an accurate model for describing a physical process or designing a physical system is beyond doubt. The currently used reliability model for physically unclonable functions (PUFs) assumes an equally likely error for every evaluation of every PUF response bit. This limits an accurate description since experiments show that certain responses are more error-prone than others, but this
fixed error rate model
only captures
average case
behavior. We introduce a new PUF reliability model taking this observed heterogeneous nature of PUF cells into account. An extensive experimental validation demonstrates the new predicted distributions describe the empirically observed data statistics almost perfectly, even considering sensitivity to operational temperature. This allows studying PUF reliability behavior in full detail, including average and
worst case
probabilities, and is an invaluable tool for designing more efficient and better adapted PUFs and PUF-based systems.