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Re: [Dcrup] Hashed Key Records

Phillip Hallam-Baker <phill@hallambaker.com> Fri, 23 June 2017 00:20 UTC

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From: Phillip Hallam-Baker <phill@hallambaker.com>
Date: Thu, 22 Jun 2017 20:20:01 -0400
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To: Scott Kitterman <sklist@kitterman.com>
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Subject: Re: [Dcrup] Hashed Key Records
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This draft describes all the requirements etc and the current proposal.

https://tools.ietf.org/html/draft-hallambaker-udf-05

The reference implementation is actually rather shorter than the draft
describing the requirements. Basically it is little more than a wrapper
around SHA-2-512.






On Thu, Jun 22, 2017 at 8:07 PM, Scott Kitterman <sklist@kitterman.com>
wrote:

> On Thursday, June 22, 2017 08:01:28 PM Phillip Hallam-Baker wrote:
> > On Thu, Jun 22, 2017 at 7:51 PM, Steve Atkins <steve@blighty.com> wrote:
> > > (and maybe be specific about what embedded whitespace means)
> > >
> > > These all seem good features..
> > >
> > > I'm reminded of the $1$... style password hashes. Immediately
> recognizable
> > > in
> > > general, but including enough embedded information that you know which
> > > spec to follow.
> >
> > ​The other thing I would like is the ability to truncate fingerprints to
> > arbitrary lengths by truncating the string specifying the fingerprint. In
> > all but a few applications, a fingerprint with a workfactor of 2^118 is
> > sufficient to prevent most attacks.​ That is 25 characters in my proposal
> > (since there is a one byte algorithm identifier prefix).
> >
> > There are also some hacks that can be used for compressing the
> fingerprint
> > but I don't think these would be relevant here.
>
> I'm probably just grumpy because it's been a long day in a long week, but
> if
> you are going to not answer my question and go off in a completely
> different
> direction (in case you missed it, my question was about what's in the draft
> now, not an invitation to imagine what should be in the draft), would you
> please at least start your own thread so others are less likely to assume I
> already got my answer somewhere in what seems likely to be a long thread
> spiraling off into some new ocean that wants boiling?
>
> Thanks,
>
> Scott K
>
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