Regardless of whether or not Y is over TOR, it cannot serve as a cut out.  All the transactions are stored on the blockchain.  So if Y tries to convert to dollars, then they have him.  Or if Y&#x27;s proxy Z tries to convert to dollars, they have Z (and by extension Y).<p>For these reasons, I cannot figure out why they don&#x27;t know who stole the MtGox bitcoins.  The only way to hide is to forever keep your booty in bitcoins.  Whenever the thief tries to convert his&#x2F;her bitcoins to money or goods, the veil of anonymity will be pierced.  And given the amount money involved in MtGox, it would be blow wide open.<p>As an aside, this has to be one of the deeper HN threads that has not devolved into a flame war.  kudos to us.