blockchain.info Mixer - How Safe/Anonymous Is It Really?

[135790]

https://blockchain.info/wallet/send-anonymously

What logs are kept?

Each anonymous transaction creates an entry in a forwarding or routing table which is used to track the final destination address and the value of the transaction. After 6 confirmations (~1 hour) the entry is permanently removed from database leaving no connection between the input and output address. Unused forwarding entries are removed after 8 hours.

So what if a L.E.A./GOV requests info about a certain TX from the Mixer with a court order - what info/logs will blockchain.info give them exactly?

Is it even possible to trace a TX in and out of the blockchain.info mixer at all after it has finished?

[1714978115]

1714978115

[1714978115]

1714978115

[1714978115]

1714978115

[1714978115]

1714978115

[piuk]

So what if a L.E.A./GOV requests info about a certain TX from the Mixer with a court order - what info/logs will blockchain.info give them exactly?

Is it even possible to trace a TX in and out of the blockchain.info mixer at all after it has finished?

While the entry is active we have information available which connects the input address and output address. Once the forwarding is complete this info is  fully deleted. Sometimes the input address private key may be kept around a little longer so that funds can be returned if the mixer entry is accidentally used twice - however the mapping to the output address is always removed so at best it is possible to determine the transation was indeed sent through the mixer but without knowing where.

No requests have ever been made, If any such request is made the service will be shutdown instead.

[davout]

How does the service compare to using Instawallet over Tor ?

[piuk]

How does the service compare to using Instawallet over Tor ?

We guarantee the transaction cannot be linked through the blockchain.

[davout]

How does the service compare to using Instawallet over Tor ?

We guarantee the transaction cannot be linked through the blockchain.

Instawallet doesn't really make such a guarantee but getting the same coins you sent is quite unlikely since bitcoind will prefer sending aged coins instead of fresher ones. Also than can be indepently checked, on blockchain.info for example

So, any significant difference except for the price ?

[piuk]

Also than can be indepently checked, on blockchain.info for example

The public taint analysis on blockchain.info is limited to 2,500 outputs, up to 100,000 outputs are scanned for the taint analysis in the mixer. The guarantee and the effort made to ensure the coins are properly mixed is the difference.

[Aahzman]

So what if a L.E.A./GOV requests info about a certain TX from the Mixer with a court order - what info/logs will blockchain.info give them exactly?

Is it even possible to trace a TX in and out of the blockchain.info mixer at all after it has finished?

While the entry is active we have information available which connects the input address and output address. Once the forwarding is complete this info is  fully deleted. Sometimes the input address private key may be kept around a little longer so that funds can be returned if the mixer entry is accidentally used twice - however the mapping to the output address is always removed so at best it is possible to determine the transation was indeed sent through the mixer but without knowing where.

No requests have ever been made, If any such request is made the service will be shutdown instead.

in the event of a shutdown, will users be able to restore their wallets to a stand-alone client from their exports/backups?

[Aahzman]

Oh. good catch. *facepalm*

[afterlife]

Not at all.

[anonXchange]

We also offer bitcoin washing and are hosted completely anonymous, so no court orders ever!

On TOR:
http://6vmgggba6rksjyim.onion/

Without TOR:
http://6vmgggba6rksjyim.onion.to/
https://6vmgggba6rksjyim.tor2web.org/

[Raoul Duke]

What is your commission anonXchange?

Your funds, as soon as he has enough of them to run away.