What is the fastest public SHA256^2 code for x86?

Asked Jun 23 '13 at 18:24

Active Jun 23 '13 at 18:24

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I am asking about the double SHA256 hashing function - the one that bitcoin uses.

Which publicly available implementation is the fastest one out there?

It can be in assembler, as long as it is for x86, also 64 bit.

asked Jun 23 '13 at 18:24

Gigi

I suspect, that since SHA256 has no real weaknesses, you can't do 2x SHA256 faster than twice the time of one SHA256... – Janus Troelsen Mar 11 '14 at 11:13

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