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Subject: RE: [legalxml-courtfiling] Strawman non-repudiation issues
From: "Nick Pope" <>
To: <>,<>
Date: Fri, 29 Apr 2005 13:21:28 +0100
Scott,
I see
a key difference between simple data origin authentication as provided by
digitial signatures on their own and non-repudiation is the time factor.
To achieve non-repudiation there needs to be proof of time of the signature
independent of the originator. The signatures used for data origin
authentication are checked at the time of the transaction, whilst for
non-repudiation the information is to be used for evidence after the
event. Also, I suggest that the proof needs to be linked to evidence of
receipt so that there there is no a dispute over whether data has been sent but
was never received.
Provided the definition of the use of signatures is within our control
the inclusion of attatchment is no great difficulty with XML signatures, and is
independent of whether data origin authentication or non-repuidation services
are provided.
Nick
