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1996-08-14 - Re: [NOISE] Geek Apartments

Header Data

From: Rabid Wombat <wombat@mcfeely.bsfs.org>
To: Ben Combee <combee@sso-austin.sps.mot.com>
Message Hash: facc786f43829625c761e4409ad305c820c883cfb9e2ecc42e7d6d78aeb08b79
Message ID: <Pine.BSF.3.91.960813201707.29349A-100000@mcfeely.bsfs.org>
Reply To: <9608131541.AA26416@sso-austin.sps.mot.com>
UTC Datetime: 1996-08-14 04:06:05 UTC
Raw Date: Wed, 14 Aug 1996 12:06:05 +0800

Raw message

From: Rabid Wombat <wombat@mcfeely.bsfs.org>
Date: Wed, 14 Aug 1996 12:06:05 +0800
To: Ben Combee <combee@sso-austin.sps.mot.com>
Subject: Re: [NOISE] Geek Apartments
In-Reply-To: <9608131541.AA26416@sso-austin.sps.mot.com>
Message-ID: <Pine.BSF.3.91.960813201707.29349A-100000@mcfeely.bsfs.org>
MIME-Version: 1.0
Content-Type: text/plain




On Tue, 13 Aug 1996, Ben Combee wrote:

> installation first.  It worked out quite well, especially the privacy
> aspects, as the dorm routers encrypted all packets so only the
> intended Ethernet node could receive it (at least that is what they
> said).  

I'm not familiar with the GA Tech network, but they probably didn't
"encrypt at the router."  They most likely used concentrators which would
send a the original packet only to the concentrator port registered for
the MAC (layer 2) address involved, and sent a packet with the payload
overwritten with "junk" out the other ports, to comply with ethernet rules
whereby all devices "see" the packet. Not encryption at all, but it does
defeat sniffing (on the local segment only) if configured in this manner. 

- r.w.

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