Newsgroups: sci.crypt
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From: dougb@comm.mot.com (Doug Bank)
Subject: Re: Clipper and conference calls
Reply-To: dougb@ecs.comm.mot.com
Organization: Motorola Land Mobile Products Sector
Date: Mon, 26 Apr 1993 15:04:34 GMT
Message-ID: <1993Apr26.150434.227@lmpsbbs.comm.mot.com>
References: <122723@netnews.upenn.edu> <1993Apr25.114820.14022@ulysses.att.com> <WARLORD.93Apr25122501@podge.mit.edu>
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|>    > Just curious, how would the Clipper Chip system handle
|>    > conference calls?
 
|> Depending on the encryption system, so long as everyone has the same
|> key, it can be done.  For example, I was using "vat", which is an
|> Internet Audio tool, for a conference call, and we were encrypting the
|> session.  (Unfortunately, one site was doing more work, and didn't
|> have the CPU for it, so it didn't sound all that good at a different
|> site)

You would have to use something other than the AT&T black box - in other
words, I don't think public key would work.  The session key would have 
to be agreed upon prior to the conversation and distributed to all 
sites beforehand.

Or go out and get a STU-III ;-)

-- 
Doug Bank                       Private Systems Division
dougb@ecs.comm.mot.com          Motorola Communications Sector
dougb@nwu.edu                   Schaumburg, Illinois
dougb@casbah.acns.nwu.edu       708-576-8207                    

These opinions do NOT reflect Motorola thinking in any way, shape, or form.
