Re: [Bitcoin-development] mid-term bitcoin security (Re: Warning message when running wallet in Windows XP (or drop support?))

[Justus Ranvier <justusranvier@gmail.com>]

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On 04/16/2014 11:06 AM, Adam Back wrote:
> Btw not to reignite the stealth vs reusable address bike shedding,
> but contrarily I was thinking it maybe actually better to try to
> rebrand address as "invoice number".  People understand double
> paying an invoice is not a good idea.  And if they receive the same
> invoice twice they'll query it.

"Invoice number" is still too coarse-grained.

If anyone cared about user privacy, then whatever was supplied to
users as an "invoice number" would be a BIP32 extended public key, or
something equivalent to that, which would allow the payer to create as
many unique addresses as they needed to avoid merging inputs.

Also, from a business accounting perspective it's broken and wrong to
assume a 1:1 relationship between payment transactions and invoices
anyway:

http://bitcoinism.blogspot.com/2014/01/business-accounting-and-bitcoin-privacy.html

- -- 
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