the skein hash function

Peter Gutmann pgut001 at
Fri Oct 31 04:25:37 EDT 2008

Bill Stewart <bill.stewart at> writes:

>A quick google-look at ASICs showed a number in the range of 300K-20M gates,
>so hash-trees could probably get speedups of up to 20-100x if you can keep
>from becoming input-speed-bound. The 300K chips were about $6, 5M at $50 and
>350MHz, which is somewhat faster than the Skein team estimate, and some of
>the denser chips didn't mention price but were starting to use 45nm

I don't know about ASICs but for FPGAs you can pay in the thousands of dollars
for a single high-end device (forget Xeons, that's the market to be in), so
you don't want to set your sights too high.  My guess is they were designing
down to a price rather than up to a performance figure.


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