Q: PUF
in [Cryptography]
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From: Mok-Kong Shen on 27 May 2010 03:19 I found an article: http://en.wikipedia.org/wiki/Physically_unclonable_function and have a layman's question: How successful has been that idea in practice, could someone kindly write a few sentences on current major examples of applications? Thanks. M. K. Shen
From: Tom St Denis on 27 May 2010 06:43 On May 27, 3:19 am, Mok-Kong Shen <mok-kong.s...(a)t-online.de> wrote: > I found an article: > > http://en.wikipedia.org/wiki/Physically_unclonable_function > > and have a layman's question: How successful has been that idea in > practice, could someone kindly write a few sentences on current major > examples of applications? There was a break recently on eprint.iacr.org. From what I recall the idea in practice isn't as secure as it would sound on paper. Tom
From: Peter Fairbrother on 28 May 2010 04:04 Mok-Kong Shen wrote: > I found an article: > > http://en.wikipedia.org/wiki/Physically_unclonable_function > > and have a layman's question: How successful has been that idea in > practice, could someone kindly write a few sentences on current major > examples of applications? Here is one use I know of, in nuclear disarmament control. They epoxy sparkles to the bomb-part or RV in a clear resin and shine lights on them at different angles - the patterns of reflections are unique for each patch. As far as I know that's still secure, but many of the newer fancy-pants electronic ones aren't. -- Peter Fairbrother
From: Peter Fairbrother on 3 Jun 2010 08:16 Peter Fairbrother wrote: > Mok-Kong Shen wrote: >> I found an article: >> >> http://en.wikipedia.org/wiki/Physically_unclonable_function >> >> and have a layman's question: How successful has been that idea in >> practice, could someone kindly write a few sentences on current major >> examples of applications? > > Here is one use I know of, in nuclear disarmament control. They epoxy > sparkles to the bomb-part or RV in a clear resin and shine lights on > them at different angles - the patterns of reflections are unique for > each patch. > > As far as I know that's still secure, but many of the newer fancy-pants > electronic ones aren't. Would you consider a chip in an ATM/credit card to be a PUF? Or a dongle? A RFID chip? If so they are very widely used. -- Peter Fairbrother
From: Mok-Kong Shen on 10 Jun 2010 15:26
Peter Fairbrother: > Would you consider a chip in an ATM/credit card to be a PUF? Or a > dongle? A RFID chip? > > If so they are very widely used. My layman's "conjecture" is that these are not to be considered PUF, because there are clearly defined and specified distinctive informations that could even eventually be modified at will, while PUF rests on physical randomness (compare here also with pseudo-randomness). M. K. Shen |