Quote from: witcher_sense on Today at 12:20:53 PM

Quote from: hZti on Today at 11:45:18 AM

Then read the Bitcoin white paper again, section 10 Privacy. It states:

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The necessity to announce all transactions publicly precludes this method, but privacy can still be maintained by breaking the flow of information in another place: by keeping public keys anonymous.

A Coin Mixer can benefit this goal, since through exchanges it is possible that you can actually decrypt the owner of a public key. Coin Mixing prevents that.

"Keeping public keys anonymous" means you never share publicly that you are somehow connected to a certain address. You can use one of your public keys in transactions with your counterparty, but outside observers won't be able to determine who the participants of the transaction are. Undergoing KYC on a centralized exchange is the opposite of keeping your public key anonymous because the exchange will know that particular public keys belong to a particular identity. But you can't use an exchange without revealing the information about yourself and your transactions! When you combine multiple public keys in a single transaction you also reveal the fact that you control them all; it's called a "common ownership heuristic." CoinJoin tries to break this particular heuristic by combining inputs from different users and creating outputs of equal amounts.

That is what I mean, CoinJoin makes sense since the privacy is lost once an adress is linked to an exchange account. This can be solved by mixing the coins. After mixing your privacy is again there and you can send coins completely anonymous.