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For example

https://www.walletexplorer.com/wallet/03457b955f9c055c/addresses shows all the addresses linked to wallet 03457b955f

How do they do that?

Thank you !!

  • 2
    en.bitcoin.it/wiki/Privacy#Blockchain_attacks_on_privacy many techniques, mostly "common input" – MCCCS Sep 19 at 18:00
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    Just to make sure you're aware: there is no such thing as a unique wallet identifier in Bitcoin. The association between addresses and wallets is a guess by that website, and the 03457b955f is an identifier chosen by walletexplorer.com for the observed cluster of (presumed related) addresses. – Pieter Wuille Sep 19 at 20:55
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How do they do that?

See https://www.walletexplorer.com/info

What is on this site?

WalletExplorer.com is Bitcoin blockchain explorer, with two additional features:

  1. it merges addresses together, if WalletExplorer thinks that they are part of the same wallet
  2. wallet can have name

How wallets are computed? When are addresses merged together?

Just a basic algorithm is used to determine wallet addresses. Addresses are merged together, if they are co-spent in one transaction. So if addresses A and B are co-spent in transaction T1, and addresses B and C are co-spent in transaction T2, all addresses A, B and C will be part of one wallet.

Sometimes, an address belongs to some service but it was never co-spent with others. Then that address stays unnamed. It is typically more often at addresses with higher amount (as there is no need to co-spending).

How are names discovered?

In most of the cases, I registered to service, made transaction(s) and saw which wallet bitcoins were merged with, or from which wallet it was withdrawn.

There is probably no easier way how to discover names other than this.

Please note that the name database is not updated, so it does not contain newer exchanges (or newer wallets of existing exchanges)

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