It is a mixer that keeps ethereum users anonymous on strong ethereum. Recently the YBDAO project has raised 7500ETH and they have submitted an unannounced Tornado Cash. It was a scam project and they were safe with the money they raised. I think this is an illusion like the way that mixers help bad guys use bitcoin for illegal activities.

You can say that to bitcoin mixer as well, wherein criminals can used it to hide their footprints.

I think those mixers are for privacy and anonymity, it' just it is being taken advantage by scammers and/or criminals, terrorists, drug peddlers.

As for this Tornado Cash, I'm sorry I'm not familiar and base on the response, it is not well known in this community. But it's good if we have this kind of Ethereum mixer though, I think many tried to built one in the past, but it was not successful.

tornado cash is already a protocol and is being used for anonymity on the ethereum network. It looks pretty new to all of us, but it does exist and has 5,000 followers on their twitter page: https://twitter.com/tornadocash
This is their website: https://tornado.cash/

Tornado Cash has deployed the beta version of the Nova pool, now it is possible to deposit and withdraw arbitrary amounts of ETH, currently the beta version limits the transfer amount to 1 ETH, the minimum withdrawal amount judging by the site data is 0.1 ETH.
https://nova.tornadocash.eth.link/

Probably works like btc in chipmixer. I never tried it yet but seen a lot of youtubes tutorials about using it. Works simply to hide their transactions and become totally anonymous. This is the favorite dapp probably of all scammers who doing rug pull and some scam projects.

But surprisingly that their tokens has been used and listed even on Binance.

Tornado Cash is one of the best services.
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Tornado Cash Co-Founder Says the Mixer Protocol Is Unstoppable
Roman Semenov says Tornado Cash is designed so a third-party can’t control it.
https://www.coindesk.com/tech/2022/01/25/tornado-cash-co-founder-says-the-mixer-protocol-is-unstoppable/

If I was involved in crime, I would not bet on only 1 project. Even if the protocol is secure, there are many other ways to find the right traces of a scammer. I would exchange the received ethereum for monero and use another mixer. But for personal privacy, this is a great project.

I think that the intention behind why tornado cash was created in the first place is good, however, just like many other things it is being taken advantage and used for illicit things. I just hope that there could be processes and protocols when it comes to transactions being suspect under scam activities, without breaking the privacy rights and terms of users of course.

Never heard or tried this one but looks decent but I'm just curious about the tx fee. Privacy is one of the issue of we have in cryptocurrency and I think this could be a good alternative but there are also some good alternative such as selling ethereum for other currency I think there are some services that allows us to exchange one currency to another without logging in or KYC but I think they can't handle big transactions.

This project called Tornado Cash was supposed to be a privacy coin but I heard they block a hacker's ETH address, should privacy coins be doing this? Haven't this move broken some protocol of this project and its utility itself?.