POTUS jammin'

[Cathal Garvey]

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 at 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 at 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,
>