[46482] in Cypherpunks
Re: Guerilla Internet Service Providers (fwd)
daemon@ATHENA.MIT.EDU (Bill Frantz)
Thu Jan 4 14:08:21 1996
Date: Thu, 4 Jan 1996 10:54:37 -0800
To: andr0id@midwest.net (Jason Rentz), cypherpunks@toad.com
From: frantz@netcom.com (Bill Frantz)
At 11:43 1/4/96 -0600, Jason Rentz wrote:
>Previous exchanges deleted...
>>
>>With a tightly focused beam (light is easy, I don't know about lower
>>frequencies), you can prevent interception except by very obvious physical
>>devices. (e.g. Someone in a cherry picker truck.) You may be able to
>>avoid the need to encrypt the link (and all the paranoia about key
>>management, advances in factoring etc. that that implies.)
>>
>>Bill
>
>The problem with this comes when you start creating links between much
>taller buildings like in San Fran. Any give building over 30 stories might
>sway a foot or so at any given time. Combine that with the other building
>and you might get a few feet of movement. (movement not including during an
>earthquake) :)
(1) No single communication technology is appropriate for every problem.
(2) A technical fix could include having the receiver send steering orders
to the transmitter. This solution would, of course, be a long way from the
low tech scavenged lens and 1/2 meter cardboard mailing tube technology I
was thinking of.
Bill
