So if you picked up the BLE broadcast request. All you know is that
*someone* within 100m is requesting bitcoin at a certain address. Not
necessarily who. The *name* is both optional, and possibly just a *handle*
of the user. If I'm sitting 5 ft away from someone at dinner and wanted to
pay them via BLE, I might see "Monkey Dude" on my list and simply ask him
"is that you?" If so, I send it. If there are two "Monkey Dude's" Then I
have to bother with the address prefix, but not otherwise.


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On Thu, Feb 5, 2015 at 1:46 PM, Eric Voskuil <eric@voskuil.org> wrote:

> 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 <mike@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.
>
>
>