Bitcoin mixers and Tumblers

I know this has been covered pretty extensivley. I have been using GRAMS, it is a great interface and very easy to use. I have used Bitcoin fog a lot in the past. Doesn anyone know if either of these services have provided any sort of evidence that they are actually tumbling coins and giving us back clean coins? I'm a pretty technical person but this i wouldn't know about. GRAMS claims to take our coins and then give us back "clean" coins that have never been in a dark market... How do we know this?

Also how does anyone know that a coin was ever in a dark market?


Comments


[4 Points] AndThenHeSays4:

Bitcoin Fog selective scams. And nigga do a taint analysis.


[4 Points] gramsadmin:

Taint analysis

Bitcoin tumbling breaks the bitcoin taint analysis. What is Taint analysis? It the record of which wallets have sent bitcoins to and from each other. So if a user send coins from wallet A to wallet B to wallet C to wallet D. Then you look at the taint analysis of wallet D, it will show that Wallet D is linked to Wallet A by some percent. The higher the percent the more closely the wallets are link and the more likely the owner of wallet A sent or received coins from wallet D. If wallet A happens to be a coinbase account link to a real identity and wallet D is a darknet market wallet, a tumbler in between those will make it so that wallet A doesn't even show up in the taint analysis of wallet D. This means there is no way they are linked.

How do you check the taint?

In this example a user buys bitcoins on coinbase send to a tumbler and tells the tumbler to send to a market address
Coinbase(wallet A) -> Tumbler (wallet B) -> Market (wallet C)

You can also get to the taint page with this blockchain.info/taint/{the bitcoins address to check}


[1 Points] alfabi:

Check how clean your coins are using the walletexplorer.


[1 Points] tailsjoin:

If you're technical, you could also check out /r/joinmarket and take control of your own tumbling.