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HomeEthereumEthereum mixer Tornado Cash blocks sanctioned addresses from its frontend

Ethereum mixer Tornado Cash blocks sanctioned addresses from its frontend

Tornado Cash, a popular Ethereum mixer that helps obfuscate crypto transactions, says it blocks crypto addresses authorized by the Office of Foreign Assets Control (OFAC), the executive body of the US Treasury.

This news means that OFAC-approved crypto wallet addresses will no longer be able to use the tornado cache. “Maintaining financial privacy is essential to maintaining our freedom, but we must not sacrifice non-compliance.” Tweet Friday tornado cash.

Tornado Cash said it will use Chainalysis oracle, a smart contract that validates whether cryptographic wallet addresses are included in sanctions specifications, to block OFAC-licensed cryptographic addresses.

News arrives the day after the Treasury Alleged North Korean hacking group Lazarus is associated with the $ 625 million theft from Axie Infinity’s Ronin Bridge. The department added an Ethereum address allegedly related to Ronin’s exploit to the sanctions list, and Tornado Cash blocked this address.

Tornado cash Created A contract that blocks addresses that were authorized more than a month ago. So far, the contract has created three transactions to block a total of 24 addresses. The address associated with Ronin’s exploit was added on Thursday.

Roman Semenov, co-founder of Tornado Cash, said changes are made only at the front end, the decentralized application (dapp) level. “Smart contracts are immutable,” Semenov said in a tweet on Friday. “The protocol (on-chain smart contract) and the front end (dapp) are different.”

In other words, he meant that the tornado cash itself could not be closed by sanctions.

Last year, the distributed protocol Uniswap and 1 inch also blocked some services from the front end.Uniswap Delisting Hosting tokens similar to offering securities and derivatives, 1 inch I started Geofence of US IP addresses has started.

Some people on Twitter have tornado cash Was criticized The move suggests that sanctions do not mean that malicious persons cannot use the service. All they have to do is send the cipher to another unauthorized address and still use the tornado cache.

Tornado Cash declined to comment on The Block’s query for this story.

The headings in this report have been updated for clarity.

© 2022 The Block Crypto, Inc. All rights reserved. This article is provided for informational purposes only. It is not intended to be provided or used as legal, tax, investment, financial, or other advice.

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