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The following archive was created by hippie-mail 7.98617-22 on Fri Aug 21 1998 - 17:16:20 ADT
David Honig (honig@otc.net)
Fri, 27 Mar 1998 09:05:01 -0800
At 07:30 PM 3/26/98 -0800, Douglas Dike wrote:
>I think I've got the general idea, but I seem to missing the key (pun
>inetended). How is Alice letting Bob know which packets are good, without
>letting everyone else know? What secret do they share?
You're getting some good, if lengthy answers. A concise answer
would be: the MessageAuthenicationCode uses a secret key. You are
enabling/disabling packets secretly by using/not using the correct MAC.
Only you and the receiver know what the correct MAC function (and key) is.
The whole point is to show that the Gov't's allowing MAC code
to be freely exported is inconsistant with other Gov't policy
about encryption, since the MAC code can be used for encryption.
------------------------------------------------------------
David Honig Orbit Technology
honig@otc.net Intaanetto Jigyoubu
Maybe them boys in Jonesboro were trying out for Lon Horiuchi's job.
The following archive was created by hippie-mail 7.98617-22 on Fri Aug 21 1998 - 17:16:20 ADT