Indeed, and with things like BIP32 it would be pointless to use one address, and I agree it is silly to reuse addresses, some for the privacy aspect, some for the revealing the pubkey on a spend aspect. But just because it is silly, doesn't mean it's necessarily required for devs to disallow it. I mean if a business doesn't care who can see their bitcoin takings and they are willing to keep shifting the bitcoin and live woth the exposed pubkey let them yea? http://www.forexminute.com/bitcoin/australian-association-asks-voluntary-bitcoin-register-individuals-companies-51183 ________________________________ From: Gregory Maxwell Sent: ‎27/‎03/‎2015 2:13 PM To: Thy Shizzle Cc: s7r@sky-ip.org; Tom Harding; Bitcoin Development Subject: Re: [Bitcoin-development] Address Expiration to Prevent Reuse On Fri, Mar 27, 2015 at 1:51 AM, Thy Shizzle wrote: > Yes I agree, also there is talks about a government body I know of warming > to bitcoin by issuing addresses for use by a business and then all > transactions can be tracked for that business entity. This is one proposal I > saw put forward by a country specific bitcoin group to their government and > so not allowing address reuse would neuter that :( I hope you're mistaken, because that would be a serious attack on the design of bitcoin, which obtains privacy and fungibility, both essential properties of any money like good, almost exclusively through avoiding reuse. [What business would use a money where all their competition can see their sales and identify their customers, where their customers can track their margins and suppliers? What individuals would use a system where their inlaws could criticize their spending? Where their landlord knows they got a raise, or where thieves know their net worth?] Though no one here is currently suggesting blocking reuse as a network rule, the reasonable and expected response to what you're suggesting would be to do so. If some community wishes to choose not to use Bitcoin, great, but they don't get to simply choose to screw up its utility for all the other users. You should advise this "country specific bitcoin group" that they shouldn't speak for the users of a system which they clearly do not understand.