Bitcoin’s privacy paradox has long been understood by its savvier users: Because the cryptocurrency isn’t controlled by any bank or government, it can be very difficult to link anyone’s real-world identity with their bitcoin stash. Then, Silk Road would release the funds to the vendor. But as the Qatari researchers’ work shows, even improving your privacy practices can’t always erase years-old evidence from the internet, particularly when that evidence is captured in the unalterable record of the blockchain. In November , Operation Onymous, an international law enforcement operation, seized over dark web domains. TNW uses cookies to personalize content and ads to make our site easier for you to use. But few if any researchers have actually documented their work to exploit those properties of bitcoin and count identifiable dark web transactions.