ietf-openpgp
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Re: [openpgp] Mining protection in fingerprint schemes

2016-04-08 21:49:26
On Fri 2016-04-08 15:32:32 -0300, Jon Callas <jon(_at_)callas(_dot_)org> wrote:
  One of the ideas we had a long time ago was that the "fingerprint"
  actually has two fields in it. A tag and a value. I'm still fond
  myself of the fingerprint that is

  <algorithm-id>:<algorithm-value>

  but I'm not wedded to the syntax. I like the idea; I don't care
  about the syntax.

The sense i got from the group was that we wanted one (and exactly one)
fingerprint for any given key.

the proposal above means that i could compute a fingerprint for key X,
and you could compute a fingerprint for key X, and then when we go to
compare them they could be different (because one of us chose a
different algorithm id than the other).  This makes fingerprint
comparison a crapshoot, or requires one side of the comparisons to
generate all possible fingerprints before they discover what the other
side has done.

     --dkg

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