To clarify on your "complexity" argument, are you saying that the POTUS-parade may be employing technology that detects other devices by their output signatures, then fires a noise-beam specifically at them to maximise power delivery and minimise energy costs/unnecessary interference? If that were the case, then a shielded, passive receiver ought to be OK, would that not include a HAM radio in listen-only mode? (<- Knows little about HAM) ->So, did OP broadcast much prior to the interference, or was their rig poorly shielded? For my part, I just doubt they're using intelligent jamming because cost isn't really a factor in their requirements, is it? They can just blare out on all the frequencies they care about, and strong-arm providers at other spectra to blackzone the region. How much power is needed to jam at the frequency band you described? We're talking about a cavalcade that could, if they considered it necessary, employ a portable nuke! Power ain't a limiting factor! :) On 28/11/14 08:46, coderman wrote:
On Wed, Nov 26, 2014 at 7:48 PM, Gregory Foster <gfoster@entersection.org> wrote:
Did Dan Geer just troll Juan for the holidays?
we all celebrate in preferred personal ways, :P
On 11/27/14, grarpamp <grarpamp@gmail.com> wrote:
Jammin is crypto, on topic... So continuing on topic... I'd bet there are papers somewhere about the difficulty in jammin true spread spectrum crypto stuff. Perhaps HERFing the receiver junction is better option if in range.
here's the game: a. you control power b. you control range c. you control complexity
so spreading spectrum farther, gets you lobes outside selective denial of service. but range can also extend to beam form in addition to beam width.
power, of course, a similar game of effort - rise above the elevated noise floor for the win.
a different type of attack and avoidance, in coding complexity, even up to logical protocol DoS.
thus, to be the most difficult to deter, you would max all three: very high powered, very wide band,complex coded and efficient cognitive links over MIMO beam forming foundation.
not long ago such requirements were comical. recently they became economically not completely infeasible.
one day, eminently portable.. :)
best regards and nazi holidays,