Re: [bitcoin-dev] BIP Number Request: Addresses over Audio

[James MacWhyte <macwhyte@gmail.com>]

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For reasons others have pointed out, it's not really plausible.

Either way, this has nothing to do with transmitting data over audio.
Please start a new thread if you want to discuss your idea instead of
hijacking this one. Thanks ;)

On Fri, Aug 12, 2016, 05:36 Erik Aronesty via bitcoin-dev <
bitcoin-dev@lists.linuxfoundation.org> wrote:

> I'm imagining a "publishable seed" such that:
>
>  - someone can derive a random bitcoin address from it -  and send funds
> to it.
>  - the possible derived address space is large enough that generating all
> possible addresses would be a barrier
>  - the receiver, however, knowing the private key, can easily scan the
> blockchain fairly efficiently and determine which addresses he has the keys
> to
>  - another interested party cannot easily do so
>
> Perhaps homomorphic encryption may need to be involved?
>
>
> On Thu, Aug 11, 2016 at 8:36 PM, Gregory Maxwell <greg@xiph.org> wrote:
>
>> On Thu, Aug 11, 2016 at 8:37 PM, Erik Aronesty via bitcoin-dev
>> <bitcoin-dev@lists.linuxfoundation.org> wrote:
>> > Still not sure how you can take a BIP32 public seed and figure out if an
>> > address was derived from it though.   I mean, wouldn't I have to
>> compute all
>> > 2^31 possible public child addresses?
>>
>> Which would take a quad core laptop about 8 hours with competent software
>>
>> And presumably you're not using the whole 2^31 space else the receiver
>> also has to do that computation...
>>
>
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