> Hey, I'm not sure that always reusing addresses has such a drastic
> effect on privacy like we always assume. I'd like to see more evidence
> for this assumption.
> https://wiki.unsystem.net/index.php/DarkWallet/Paranoia#Address_reuse
> The vast majority of addresses in the blockchain are uniquely used.
> We can see this by comparing both those graphs.
>
> I'm also interested in other data and stats we can collect to improve
> privacy and freedom of users to transact. Also usage stats and things
> that can improve software utility for the usecases we're interested in.

Thanks for sharing, Amir :) I'm very interested in all these stats, but I
didn't know how to generate them myself. The day before yesterday I
downloaded a postgresql dump that you shared back in 2011.
https://bitcointalk.org/index.php?topic=38246.0

Could you ellaborate a bit on what is shown on the plots and why it
evidences that addresses are uniquely used? Could you share the raw data
and/or explain how can obtain it myself?

I read the paper "A Fistful of Bitcoins: Characterizing Payments Among Men
with No Names" and they mentioned that they use Andresen's bitcointools
(What is the unsystem alternative?). The authors propose techniques to
link addresses that belong to the same user. If I understood everything
correctly, those techniques will no longer be useful as soon as some
people start using CoinJoin and DarkWallet.

It would be extremely interesting to gather stats about the use of
CoinJoin in the blockchain. I expect an increase in the number of CoinJoin
transactions when DarkWallet is available.

Regarding address re-use, my understanding was that disposable addresses
that are used only once are a necessary but not sufficient condition for
anonymity and privacy. Am I right?

Sorry for the avalanche of questions. Keep up the great work in writing
awesome free software and educating the community.

Jaume