<p>Dark Wallet is probably the closest to actively implementing something along these lines in a client.</p>

<p>See:</p>

<p><a href="https://wiki.unsystem.net/index.php/DarkWallet/Alpha#Mixing" rel="nofollow">https://wiki.unsystem.net/index.php/DarkWallet/Alpha#Mixing</a></p>

<blockquote>
  <p>When sending, the transaction is sent to an internal mixer, that
  starts announcing on the coinjoin channel, if another peer answers,
  both will negotiate a shared transaction that includes both peers
  inputs and outputs. If successful the final transaction will be sent
  into the network.</p>
  
  <p>You can see how a transaction from the mixer looks
  <a href="https://blockchain.info/tx/c38aac9910f327700e0f199972eed8ea7c6b1920e965f9cb48a92973e7325046" rel="nofollow">https://blockchain.info/tx/c38aac9910f327700e0f199972eed8ea7c6b1920e965f9cb48a92973e7325046</a></p>
</blockquote>

<p>And also the multisig section that follows:</p>

<blockquote>
  <p>Multisig funds are special bitcoin addresses that can be spent from
  only by a number of participants signing the transactions. This means
  accounts can be held among several people or devices, and several
  signatures (above some threshold) will be needed to spend.</p>
</blockquote>

CC BY-SA 3.0
2014-05-09T03:49:54.260Z
2014-05-09T03:49:54.260Z
CoinHeavy
<p><a href="https://bitcointalk.org/index.php?topic=24784.msg1308187#msg1308187" rel="nofollow">In this thread, Luke Jr mentioned Collective Transactions</a> would be a way for clients to increase anonymity when issuing transactions.</p>

<ul>
<li>How would such an implementation work?</li>
</ul>

<p>(Please provide technical details or references as available)</p>

<transactions><client><privacy>
How would a P2P "Collective Transaction" be implemented (to increase privacy)
makerofthings7
# How would a P2P "Collective Transaction" be implemented (to increase privacy)

(Asked by: username_0 on 2013-06-18)

[In this thread, Luke Jr mentioned Collective Transactions](https://bitcointalk.org/index.php?topic=24784.msg1308187#msg1308187) would be a way for clients to increase anonymity when issuing transactions.

* How would such an implementation work?

(Please provide technical details or references as available)

**Tags:** transactions, client, privacy


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## 1 answers

### Answer by username_1 on 2014-05-09. Score: 1

Dark Wallet is probably the closest to actively implementing something along these lines in a client.

See:

<https://wiki.unsystem.net/index.php/DarkWallet/Alpha#Mixing>

> When sending, the transaction is sent to an internal mixer, that
> starts announcing on the coinjoin channel, if another peer answers,
> both will negotiate a shared transaction that includes both peers
> inputs and outputs. If successful the final transaction will be sent
> into the network.
>
> You can see how a transaction from the mixer looks
> <https://blockchain.info/tx/c38aac9910f327700e0f199972eed8ea7c6b1920e965f9cb48a92973e7325046>

And also the multisig section that follows:

> Multisig funds are special bitcoin addresses that can be spent from
> only by a number of participants signing the transactions. This means
> accounts can be held among several people or devices, and several
> signatures (above some threshold) will be needed to spend.


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