[Cryptography] jammers, nor not

[mok-kong shen]

Am 28.02.2017 um 01:52 schrieb John Denker:
> On 02/27/2017 02:14 PM, Henry Baker wrote:
>> jamming devices will become *essential*.
>
> Just in case it wasn't obvious, jammers are illegal in the US.
>
> IANAL, but the last time I checked, there was an exception for military
> and Federal law enforcement, but not state or local.  Don't bother
> asking for an exemption; there is not even a process for granting one,
> no matter how noble your purpose may be.
>
> a) I reckon you can use a scanner so you can detect and confiscate any
>  transmitters if/when they are brought in.
> b) I reckon you are allowed to turn your home or office into a Faraday
>  cage.
> c) OTOH there is zero tolerance for active jammers.
>
> See e.g.
>   https://www.fcc.gov/general/jamming-cell-phones-and-gps-equipment-against-law
> and references therein.

I vaguely remember to have read in a book that in US a permission
is needed to have a Faraday-shielded conference room.

M. K. Shen