ietf-openpgp
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Re: [openpgp] Version 5 key and fingerprint proposal

2017-03-16 10:25:56
Werner Koch <wk(_at_)gnupg(_dot_)org> writes:

On Tue, 14 Mar 2017 11:17, wk(_at_)gnupg(_dot_)org said:

What do others think:

 - Use SHA-256 and truncated to 200 bits
 - Use SHA-512 and truncated to 200 bits
 - Anything else

No opinions?

Considering these days I work with very small systems, I'm in favor of
SHA2-256 because in my environments it's much faster.  Even if SHA2-512
is faster on larger systems, the clock-wall time still gives SHA2-256
the advantage when you compare 256 vs 512 on a 16MHz 16-bit platform
versus a 32/64-bit 2GHz platform.

I.e., it doesn't bother me if SHA2-256 is a fraction of a millisecond
slower on a large system, but it's tens or hundreds of milliseconds
faster on the constrained device.

Thanks,

Shalom-Salam,

   Werner

-derek

-- 
       Derek Atkins                 617-623-3745
       derek(_at_)ihtfp(_dot_)com             www.ihtfp.com
       Computer and Internet Security Consultant

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