Do all input addresses in a transaction always belong to same user?

[ani4444]

Do all input addresses in a transaction always belong to same user?
Eg:
https://blockchain.info/tx/a7df580e6f1c6e0ad9627b77295cafd73836e0d7827116d5237fb6c25b60efbe

Can it be safely assumed that the following addresses belong to the same user.

Code:

18KUnn8L8DhiASGNNJbC5V49MBQTy6uFVu
1BZZEdvuP5qKPLq7wbXcZ6f3zBMbhqzJRg
12XpnNjijxV5sa1xiaD7XE9QudcWKLQhbZ

Other examples:
https://blockchain.info/tx/c1ce9b849e014fa25d2089493b008e8edcb8f5db42ca40b451700588cb4a71d1
https://blockchain.info/tx/a7df580e6f1c6e0ad9627b77295cafd73836e0d7827116d5237fb6c25b60efbe

[Alaki]

Do all input addresses in a transaction always belong to same user?

Yep, they do belong the the same user(wallet) as far as I know.

Eg:
https://blockchain.info/tx/a7df580e6f1c6e0ad9627b77295cafd73836e0d7827116d5237fb6c25b60efbe

Can it be safely assumed that the following addresses belong to the same user.

Code:

18KUnn8L8DhiASGNNJbC5V49MBQTy6uFVu
1BZZEdvuP5qKPLq7wbXcZ6f3zBMbhqzJRg
12XpnNjijxV5sa1xiaD7XE9QudcWKLQhbZ

Yep. However, you can also verify them here-> https://www.walletexplorer.com/wallet/11e5dada77ed81bc/addresses . You can therefore say that the three addresses(given above) are a part of the same wallet [11e5dada77].

[shorena]

No, see e.g. CoinJoin[1], SharedSend[2] or JoinMarket[3].

[1] https://en.wikipedia.org/wiki/CoinJoin
[2] https://sharedcoin.com/
[3] https://bitcointalk.org/index.php?topic=919116.0

[ani4444]

Do all input addresses in a transaction always belong to same user?

Yep, they do belong the the same user(wallet) as far as I know.

Eg:
https://blockchain.info/tx/a7df580e6f1c6e0ad9627b77295cafd73836e0d7827116d5237fb6c25b60efbe

Can it be safely assumed that the following addresses belong to the same user.

Code:

18KUnn8L8DhiASGNNJbC5V49MBQTy6uFVu
1BZZEdvuP5qKPLq7wbXcZ6f3zBMbhqzJRg
12XpnNjijxV5sa1xiaD7XE9QudcWKLQhbZ

Yep. However, you can also verify them here-> https://www.walletexplorer.com/wallet/11e5dada77ed81bc/addresses . You can therefore say that the three addresses(given above) are a part of the same wallet [11e5dada77].

Thanks, are you aware of any other service which also gives the wallet id for an address preferably with api.

No, see e.g. CoinJoin[1], SharedSend[2] or JoinMarket[3].

[1] https://en.wikipedia.org/wiki/CoinJoin
[2] https://sharedcoin.com/
[3] https://bitcointalk.org/index.php?topic=919116.0

Thanks, exactly what I was afraid of.

[shorena]

-snip-

No, see e.g. CoinJoin[1], SharedSend[2] or JoinMarket[3].

[1] https://en.wikipedia.org/wiki/CoinJoin
[2] https://sharedcoin.com/
[3] https://bitcointalk.org/index.php?topic=919116.0

Thanks, exactly what I was afraid of.

No reason to be afraid of some privacy enhancing tools.

[SebastianJu]

Well, for catching scammers it would have been a great thing when you could use it as a real proof and not only as a very strong hint.