<p>No.</p>

<p>In practice, it is likely, but in several more complex use cases, transactions can be jointly constructed.</p>

<p>For example CoinJoin implies combining both inputs and outputs from multiple people together into a single transaction to make it less obvious which outputs belong to whom.</p>

CC BY-SA 3.0
2014-07-11T14:48:25.163Z
CoinJar description https://bitcointalk.org/index.php?topic=279249.0
Pete
CC BY-SA 3.0
2014-07-11T14:35:28.490Z
2014-07-11T14:35:28.490Z
Pieter Wuille
<p>When you are looking at a Bicoin transaction in the block chain and it has inputs from multiple addresses is it safe to assume that those addresses are all controlled by the same person/organization/wallet software?</p>

<p>Here is an example of a transaction with 31 different input addresses</p>

<p><a href="https://blockchain.info/tx/a6bffa6208c72412399997b0c504670662e259fd5ba50128d0e2823b739bd18b" rel="nofollow">https://blockchain.info/tx/a6bffa6208c72412399997b0c504670662e259fd5ba50128d0e2823b739bd18b</a></p>

<p>If I have definitive proof that one of those addresses is associated with someone can I infer that the other 30 are as well?</p>

<transactions><blockchain>
Can you assume that all inputs to a Bitcoin transaction are controlled by the same person?
Pete
# Can you assume that all inputs to a Bitcoin transaction are controlled by the same person?

(Asked by: username_0 on 2014-07-11)

When you are looking at a Bicoin transaction in the block chain and it has inputs from multiple addresses is it safe to assume that those addresses are all controlled by the same person/organization/wallet software?

Here is an example of a transaction with 31 different input addresses

<https://blockchain.info/tx/a6bffa6208c72412399997b0c504670662e259fd5ba50128d0e2823b739bd18b>

If I have definitive proof that one of those addresses is associated with someone can I infer that the other 30 are as well?

**Tags:** transactions, blockchain


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## 1 answers

### Answer by username_1 on 2014-07-11. Score: 6 | Accepted answer

No.

In practice, it is likely, but in several more complex use cases, transactions can be jointly constructed.

For example CoinJoin implies combining both inputs and outputs from multiple people together into a single transaction to make it less obvious which outputs belong to whom.

> **Comments:**
> **username_0**: CoinJar description https://bitcointalk.org/index.php?topic=279249.0  

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