In message <[EMAIL PROTECTED]>
, "Trei, Peter" writes:
>http://www.nsa.gov/wwii/papers/start_of_digital_revolution.htm
>
>Fascinating article at the NSA site about the
>heroic efforts to provide long-distance secure voice
>communications over radio.
>
>The good folks at Bell Labs essentially invented
>digitized, compressed voice, and encrypted it
>using synchronized pairs of records of
>random data at each end. Each terminal site
>had 55 *tons* of equipment!
>
>Apparently this astounding - and apparently
>successful - effort was mostly declassified
>back in '76, but I first heard about it in
>Stevenson's Cryptonomicon last year.
There's an exhibit on this system in the War Room museum in London.
--Steve Bellovin, http://www.research.att.com/~smb
