US Treasury Sanctions Crypto Mixing Service Tornado Cash

In its first on-chain DeFi protocol sanction, the US Treasury Department added Tornado Cash to its blocked list

article-image

Source: DALL·E

share

key takeaways

  • Tornado cash is now on the Treasury’s list of services US individuals cannot use
  • The sanctions come as money moved via crypto mixing services increased in 2022

In its first on-chain decentralized finance protocol sanction, the US Treasury Department added decentralized cryptocurrency mixing service Tornado Cash to its blocked list, according to documents released Monday. 

The Office of Foreign Asset Control added Tornado Cash and 45 related Ethereum wallet addresses to the Specially Designated Nationals (SDN) list, meaning that their “assets are blocked and U.S. persons are generally prohibited from dealing with them,” according to the Treasury Department.

US Secretary of State Anthony Blinken initially mistakenly identified Tornado Cash as “a U.S.-sanctioned, DPRK state-sponsored hacking group, used by the DPRK to launder money,” in a subsequently-deleted tweet. 

Secretary Blinken later clarified that Tornado Cash was merely used by a North Korean hacking group to launder money. 

Loading Tweet..

The sanctions come as 2022 has seen an uptick in the use of crypto mixing services, which allow users to conceal the transaction history of certain cryptocurrencies by pooling and mixing them together with other users’ funds. 

The 30-day moving average of value received by mixers reached an all-time high of nearly $52 million worth of crypto on April 19, according to a report by Chainalysis published in July. This is roughly double the volumes seen at the same time in 2021.

Mixers have also come under increased scrutiny as concerns about sanctioned Russian entities using crypto to circumvent the rules mounts. 

Read more: Coin Mixers and Privacy Coins: Can They Resist Censorship?

This is a developing story.

Updated Aug. 8, 2022, 12:50 pm ET.


Get the news in your inbox. Explore Blockworks newsletters:

Tags

Upcoming Events

Old Billingsgate

Mon - Wed, October 13 - 15, 2025

Blockworks’ Digital Asset Summit (DAS) will feature conversations between the builders, allocators, and legislators who will shape the trajectory of the digital asset ecosystem in the US and abroad.

Industry City | Brooklyn, NY

TUES - THURS, JUNE 24 - 26, 2025

Permissionless IV serves as the definitive gathering for crypto’s technical founders, developers, and builders to come together and create the future.If you’re ready to shape the future of crypto, Permissionless IV is where it happens.

Brooklyn, NY

SUN - MON, JUN. 22 - 23, 2025

Blockworks and Cracked Labs are teaming up for the third installment of the Permissionless Hackathon, happening June 22–23, 2025 in Brooklyn, NY. This is a 36-hour IRL builder sprint where developers, designers, and creatives ship real projects solving real problems across […]

recent research

Unlocked by Template (7).png

Research

Union’s improvements upon Tendermint consensus through CometBLS, coupled with ZK proving through Galois, allow for a broadly scalable, cost efficient, and low latency IBC implementation that is feasibly scalable across every existing blockchain, virtual machine and runtime. The implementation offers modular crosschain interoperability without the need for trusted intermediaries.  

article-image

Kraken’s chief security officer Nick Percoco said the exchange turned the tables on a North Korean hacker

article-image

Or is it approximately the least cypherpunk thing we could do?

article-image

Over 20% of SOL-USD swap volume goes through SolFi

article-image

CEO Vlad Tenev calls expected clarity on listing crypto asset securities “a big opportunity”

article-image

Big Tech pulled US indexes back into the green Thursday, as investors waited for two more Mag 7 first-quarter reports after the bell

article-image

Charts and takeaways from Tuesday’s jobs report and Wednesday’s GDP print, as the economy digests the tariff war