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

[Dave Crocker]

On 10/6/2014 4:44 PM, Tamme Schichler wrote:
> The problem is that B has a history of lying
> about such conversations, so A wants to be able to prove as much as
> becomes necessary to deflect allegations, but also little as possible to
> protect the privacy of either side or third parties (or the other way
> around, as usual the solution would ideally be symmetric).


Sounds like a classic requirement for Non-Repudiation of Recipient:

   http://www.cse.scu.edu/~tschwarz/coen351_06/PPtPre/Nonrepudiation.ppt

   http://ccr.sigcomm.org/archive/1996/jan96/ccr-9601-coffey.ps

d/
-- 
Dave Crocker
Brandenburg InternetWorking
bbiw.net