Six users of the cryptocurrency mixer that facilitates anonymous transactions on the Ethereum blockchain are challenging the United States Treasury Department’s decision last month to sanction the service. (The Logic)

Talking point: The lawsuit will be an important test of some key values of the cryptocurrency sector. Crypto undermines the ability of governments to control economic activity of all kinds, with mixing services like Tornado Cash making it even more difficult for authorities to trace transactions. Proponents argue this is a good thing, upholding the democratic principles of freedom and privacy—in this case allowing a plaintiff in the lawsuit to make an anonymous donation to Ukraine. Detractors, such as the Treasury Department, argue any such benefits to legitimate users are outweighed by the cover it provides to money launderers and cyber criminals. Coinbase argues the Treasury Department exceeded its authority with the Tornado Cash sanctions by targeting an open source technology, rather than individual bad actors.