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Re: [smime] [pkix] Research question: Witnessing by digital signature

2010-06-16 23:53:55
Matt McCutchen <matt(_at_)mattmccutchen(_dot_)net> writes:
On Fri, 2010-06-11 at 06:01 +1000, Stephen Wilson wrote:
Has any work been done in PKIX or elsewhere on formal witnessing of
digital signatures?  And/or ... does anyone in the group know of real
life instances where a digital signature is witnesses and attested to
using another dig sig?

How would one "witness" a digital signature?  To witness a physical signature
means that one has personal knowledge that the signer intentionally signed the
document.  Simply adding a digital signature to a document bearing someone
else's digital signature is not witnessing in this sense.

  "When I use a word it means just what I choose it to mean -- neither more
   nor less"
   -- Humpty Dumpty (and PKI).

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