Dutch authorities said they had arrested a 29-year-old man believed to be a developer for the crypto mixing service Tornado Cash, which the United States put on its sanctions list.
The U.S. Sanctions announced followed allegations that Tornado Cash was helping conceal billions in capital flows, including for North Korean hackers.
By mixing cryptocurrencies, the online service makes it possible to conceal the origin; or destination of digital payments, increasing their anonymity.
Tornado Cash is one of the largest crypto blenders identify as problematic by the U.S. Treasury.
The Dutch public prosecutor’s office for serious fraud, environmental crime and asset confiscation (FIOD) said Tornado laundered more than $7 billion worth of virtual currency since 2019.