I agree, audio-based transference isn't really great for a podcast or radio ad. It could be used to transmit payment details between phones that don't have cameras, though. I think it would be better to define a standard for transmitting information over audio, but not define what information is to be conveyed so people could use the method for sending pub keys, payment protocol requests, or anything else developers might want to make use of.

I'm guessing some sort of data-over-audio standard already exists? In which case the bip could just say "we use [standard] to convey any bitcoin-related data".


On Wed, Aug 10, 2016, 10:55 Daniel Hoffman via bitcoin-dev <bitcoin-dev@lists.linuxfoundation.org> wrote:

thats how i thought it worked originally, but im not well versed on that, so i took his word for it


On Aug 10, 2016 12:38 PM, "Pieter Wuille via bitcoin-dev" <bitcoin-dev@lists.linuxfoundation.org> wrote:
On Wed, Aug 10, 2016 at 7:28 PM, Erik Aronesty via bitcoin-dev
<bitcoin-dev@lists.linuxfoundation.org> wrote:
> By sending a public seed,  there's no way for someone to use the transmitted
> address and trace the total amount of payments to it.

Worse. By revealing a public seed, anyone who has seen it (= anyone
who ever pays you through it) can identity all payments to _any_
address derived from that seed.

--
Pieter
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