[messaging] Provable (private) conversation while allowing (somewhat) precise redaction

Dave Crocker dhc at dcrocker.net
Thu Oct 9 13:07:43 PDT 2014

On 10/9/2014 9:08 AM, Tamme Schichler wrote:
> Thanks for these links, the proofs of receipt are definitely something I
> need to look into. Ideally it should be simultaneous, but I don't know a
> scheme that can do that without a witness.
> Since I'm thinking about a chat protocol 

Non-repudiation of receipt throughout a conversation.  Interesting

Yeah, I doubt there's a deployed solution, though I'm not plugged in to
the right communities to be sure.

FWIW, what I've been used to seeing, for non-repudiation mechanisms, is
a requirement for an independent time-stamping service, rather than for
a more elaborate third-party role.

Relevant links that popped up on non-rep, recipient, conversation:

   Non-Repudiation in Internet Telephony




(I was amused to see that the end of the google list for that search was
a pointer to my previous message to you...)


Dave Crocker
Brandenburg InternetWorking

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