BLE has an advertised range of over 100m.
http://www.bluetooth.com/Pages/low-energy-tech-info.aspx
In the case of mass surveillance that range could most likely be extended
dramatically by the reviewer. I've seen WiFi ranges of over a mile with a
strong (not FCC approved) receiver.
WiFi hotspots don't have strong identity or a guaranteed position, so they
can't be trusted for location.
e
On Feb 5, 2015, at 1:36 PM, Mike Hearn <m...@plan99.net> wrote:
>> This sounds horrible. You could basically monitor anyone with a wallet in a
>> highly populated area and track them super easily by doing facial
>> recognition.
>
> We're talking about BLE, still? The radio tech that runs in the so called
> "junk bands" because propagation is so poor?
>
> My watch loses its connection to my phone if I just put it down and walk
> around my apartment. I'm all for reasonable paranoia, but Bluetooth isn't
> going to be enabling mass surveillance any time soon. It barely goes through
> air, let alone walls.
>
> Anyway, whatever. I'm just bouncing around ideas for faster user interfaces.
> You could always switch it off or set it to be triggered by the presence of
> particular wifi hotspots, if you don't mind an initial bit of setup.
>
> Back on topic - the debate is interesting, but I think to get this to the
> stage of being a BIP we'd need at least another wallet to implement it? Then
> I guess a BIP would be useful regardless of the design issues. The prefix
> matching still feels flaky to me but it's hard to know if you could really
> swipe payments out of the air in practice, without actually trying it.
>
>
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