[5457] in cryptography@c2.net mail archive
Re: s/w radios & secure modules
daemon@ATHENA.MIT.EDU (Arnold Reinhold)
Mon Aug 23 13:03:22 1999
In-Reply-To: <v04210100b3e542ba4d41@[63.193.122.223]>
Date: Mon, 23 Aug 1999 12:36:59 -0400
To: Martin Minow <minow@pobox.com>, David Honig <honig@sprynet.com>,
cypherpunks@toad.com, cryptography@c2.net
From: Arnold Reinhold <reinhold@world.std.com>
At 11:06 PM -0700 8/21/99, Martin Minow wrote:
>At 2:39 PM -0700 8/21/99, David Honig wrote:
>>In the Aug 16 '99 EETimes, there are several articles
>>about software radios. These have analog front ends,
>>and after down-conversion are digital. This lets you
>>deal with complex back-compatability/protocol/DSP improvement/legal issues
>>flexibly.
>>
>
>The September issue of the amateur radio magazine, QST,
>has the circuit diagram and construction details for a
>2 meter (144 Mhz) transceiver (receiver and transmitter).
>The software for the DSP and radio control, source included,
>is promised for the October issue.
>
There is another angle to this story that relates to cryptography.
While the FCC may need to try to regulate transmitters to prevent
interference, the main reason they regulate receivers is to prevent
public demand for encrypted cell phones. Congress mandated this and
is considering tighter restrictions. (Yeah, the FCC also wants to
make sure the receiver local oscillator doesn't radiate too much, but
that is a minor issue).
Arnold Reinhold
