On 02/05/2015 12:50 PM, Mike Hearn wrote:
>     I'm imagining myself walking around broadcasting my photo and MAC
>     address while hucksters push payment requests to me for approval
> 
> I hate to break it to you, but you broadcast a photo of your face every
> time you walk outside ;)
> 
> Bluetooth MAC addresses are random, they aren't useful identifiers. If
> someone can see you, a face is a far more uniquely identifying thing
> than a MAC.

Interesting take on privacy. But the market will of course decide.

Would the merchant be broadcasting payment requests in the clear, or
would they be encrypted with a public key of the spender?

> "Payment spam" might be a problem. I can imagine a wallet requiring that
> such requests are signed and then spammers can be blacklisted in the
> usual fashion so they can't push things to your phone anymore. Anyway, a
> hurdle that can be jumped if/when it becomes an issue.

Not sure I'd shoot for a system that's guaranteed to require PKI with
blacklisting and spam filtering.

e