How are the Baltimore riots going?/Any way we can help?

Mirimir mirimir at
Sun May 3 11:45:38 PDT 2015

On 05/03/2015 11:20 AM, Georgi Guninski wrote:
> On Sat, May 02, 2015 at 06:21:16PM -0600, Mirimir wrote:
>> For the Faraday bag, see
>> <>. It's easy to
>> test. Just put the phone in the bag, and call it. If it rings, there are
>> leaks.
> I am noob at smartphones, but isn't this very close to
> functionally equivalent to just physically remove the
> battery from the phone?
> At what distance is phone with removed battery detectable?
> Well, if someone implanted "backup battery" this fails,
> but the implanted battery must be sufficiently small
> to not see it.

I don't know enough about smartphones to say. The effectiveness of
removing the battery may vary among devices. Snowden told people
visiting him in Hong Kong to put their phones in the refrigerator, which
is a Faraday cage. Also, using a bag is arguably less hassle than
removing the battery.

More information about the cypherpunks mailing list