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Questions tagged [puf]

A PUF (Physical Uncloneable Function) is a method for designing a circuit which it is infeasible to reproduce or simulate exactly, and from which a unique secret key can be extracted.

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Why is SRAM PUF considered weak PUF?

I have read in many places that SRAM PUF is considered a weak PUF, since it generates a single response (based on the value of all RAM cells upon power-up). Why can't I use just a limited number of ...
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What stops a physical attacker to use a dumped uninitialized SRAM with SRAM-PUF?

Does SRAM-PUF require the microcontroller/system to be (1) on the same silicon piece and (2) to prevent access from dumping the SRAM in an uninitialized state in order to be tamper-proof? In SRAM ...
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1answer
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Applicability of physical unclonable functions for public-key cryptography

Can physical unclonable functions (PUFs) be used to protect secrets against physical tampering in the context of public-key cryptography? Some solutions (i.e. ChipDNA or QuiddiKey) apparently use ...
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92 views

How is the inter and the intra distance of a PUF calculated?

I was wondering, if I want to calculate the intra distance of a PUF, and I have already measured $n$ times a response to a challenge. Do I choose one reference value and compare the hamming distance ...
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1answer
146 views

How can PUF hardware be proportional to the number of challenge/response bits?

Wikipedia article claims that physical unclonable functions are superior to ROM because they require less hardware: Unlike a ROM containing a table of responses to all possible challenges, which ...
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In what sense are silicon PUFs unclonable?

I see quite a few publications on Physically Unclonable Functions implemented using regular silicon IC techniques; for example A 0.19pJ/b PVT-variation-tolerant hybrid physically unclonable function ...
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1answer
345 views

Do Quantum Key Distribution and Physical Unclonable Functions combine, and how?

I see there's a project to combine Quantum Key Distribution, Physical Unclonable Functions, and classical crypto, in order to secure a high speed (100Gb/s) optical link. While there does not seem to ...
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288 views

Helper data authentication in PUFs

As I understand, PUFs work by using two procedures: generation and reproduction. Generation reads a value $w$ from a fuzzy source and generates a key $R$ and helper data $P$. Then, in the reproduction ...