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Re: [HAM-AG] [IPv6] Request for feedback: draft-evan-amateur-radio-ipv6

Donald Eastlake <d3e3e3@gmail.com> Wed, 15 February 2023 23:28 UTC

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From: Donald Eastlake <d3e3e3@gmail.com>
Date: Wed, 15 Feb 2023 18:27:38 -0500
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To: Evan Pratten <ewpratten@gmail.com>
Cc: Alexandre Petrescu <alexandre.petrescu@gmail.com>, IPv6 <ipv6@ietf.org>, ham-ag@ietf.org
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Subject: Re: [HAM-AG] [IPv6] Request for feedback: draft-evan-amateur-radio-ipv6
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Hi,

On Wed, Feb 15, 2023 at 3:03 PM Evan Pratten <ewpratten@gmail.com> wrote:
>
> On Wed, Feb 15, 2023 at 2:58 PM Donald Eastlake <d3e3e3@gmail.com> wrote:
> > I'm not sure the hash even needs to be cryptographic.
>
> Agreed. I would call a cryptographic hash *undesierable*. Why waste
> processing power hiding the callsign when you have to ID yourself
> anyways?
>
> I am admittedly far from an expert on hashing algorithms. Donald, do
> you have any suggestions that fit the properties you outlined by
> chance?

Indeed, I would suggest using FNV-64 truncated to the top 60 bits, See
https://datatracker.ietf.org/doc/draft-eastlake-fnv/

Here is an article on using FNV-32 for IPv6 flow label
https://researchspace.auckland.ac.nz/bitstream/handle/2292/13240/flowhashRep.pdf

Thanks,
Donald
=============================
 Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
 2386 Panoramic Circle, Apopka, FL 32703 USA
 d3e3e3@gmail.com

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