The Justice Department disputed the characterization of Roman Storm’s Tornado Cash operation in a new filing.

The DOJ charged Storm, along with fellow developer Roman Semenov, with conspiracy to launder money, conspiracy to operate an unlicensed money transfer, and conspiracy to violate sanctions laws by creating and operating Tornado Cash, a cryptocurrency mixing service designed to anonymize transactions. North Korea’s Lazarus Group and other criminal groups laundered money through Tornado Cash, US authorities claim.