Privacy coins and KYT: what they hide and what they do not

What Monero and Zcash hide

Bitcoin shows all of it: the sending address, the receiving address, the amount. People confuse that with anonymity. An address is only a number, and the moment one gets tied to a person, their whole history is open for good.

Monero closes three things at once. The sender's signature is mixed with other people's, so nobody can say which one is real. The receiver gets a one-time address for every payment. The amount is encrypted, yet the network can still check that what went in matches what came out. Zcash took a different route: privacy is optional there, and open addresses live next to shielded ones.

The year privacy networks beat the market

Privacy usually gets discussed as a risk. The market spent the last year voting the other way: Zcash is up 1,322% over the year, Monero 54%, and bitcoin lost 44% over the same window. Together with Dash the privacy networks are worth $16.9 billion, which is 0.74% of the market: a tiny share moving hard.

The reason shows up in the calendar of restrictions. The louder the debate about limiting something, the more attention it gets: demand for private payments did not go anywhere, and the number of places that accept them fell.

Daily candles

The desk watches both names on Binance. Daily candles below, straight from TradingView. Scale, period and drawing tools work inside the frame.

Why people are afraid of them

An exchange has to know where money came from. With an ordinary coin it can walk the chain itself. With a private one it cannot: there is no way to verify the origin independently, and the exchange still carries the liability.

So privacy coins keep disappearing from large venues in the EU, Japan and South Korea, and Russia is discussing an outright ban on trading them on regulated platforms.

A closed blockchain comes in four kinds

The argument gets flattened into "Monero versus everyone", but there are already four designs and they hide different things. The breakdown comes from Chainalysis, the company whose tools exchanges use to screen transfers. Their conclusion is worth reading in full, because it is not a call for a ban:

Look at the third column. Three of the four designs have a built-in way to show an auditor what is hidden: a viewing key, access from whoever issued the token, a designated auditor. That is the middle path the two camps below argue about, and it already exists.

The fourth row is the honest one: private smart contracts have no built-in auditor at all, so disclosure has to be written into the deal itself. Chainalysis adds the part people forget, which is that the closed section is not the only thing worth watching.

Which is the whole point of this article: the middle of the chain matters less than its two ends.

What an outsider can read

The difference between an open and a closed network is not that one is "safer". It is what a person can read when all they have is a link to the payment.

The last row is the contested one. No network writes down the owner's name. What differs is how much work it takes to recover it: on an open network one purchase on an exchange with ID checks is enough, on a closed one you need an entry or an exit, where those checks also sit.

What KYT means in plain words

KYT stands for "know your transaction". The ID check everyone knows answers "who are you". KYT answers a different question: "where did this money come from". What gets checked is the payment, not the person: which addresses it passed through, and whether any of them showed up in a theft, a scam or a sanctions list.

It works like this. A service keeps a list of known bad addresses and measures how close your payment stood to them. Straight from a hacked exchange's address means rejection. Ten hands away but the trail still leads there means a question for the sender.

Where the privacy ends

Inside its own network Monero really is closed. Money rarely stays inside though: sooner or later it gets swapped for ordinary money, and that happens at an exchange, a swap service or a payment provider. That is where the payment meets a name, an ID, a network address and a timestamp.

Which leads to something rarely said out loud: a private blockchain protects the middle of the route, not its ends. Investigations almost always work the ends.

Crypto split into two camps

The argument is not really about Monero. It is about what a blockchain should be by default: a place where everything is visible and everyone can be identified, or a place where only what you chose to show is visible. Both camps speak publicly and neither is made of anonymous accounts.

The gap between the camps is narrower than the headlines suggest. Chainalysis says privacy yes, anonymity no. Fhenix, building a token with two modes, states plainly that only the amounts are hidden: "the current design still leaves sender, receiver and transaction timing visible onchain". Both are walking toward the same place: show less, to fewer people, while keeping a way to prove where the money came from when asked.

A third position: privacy as a mode, not a coin

Some people build private payments straight onto a public network. On 12 August Solana ran an hour-long broadcast, "The Privacy Show", with Mert Mumtaz, who runs Helius, and his colleague Tilo from the privacy team. The desk transcribed the whole recording. Below are the parts where they explain why the sender and receiver addresses are deliberately left visible.

The contrast with a private blockchain is sharp. Monero hides everything and lives with being delisted. Helius hides the amounts and the contents, leaves the ends in the open, and gets the thing everyone was after: a private payment an exchange can accept. Same trade-off, decided the other way.

One more observation from the same hour explains why there will be no single answer: a private ring run by a bank and a private ring open to everyone are different legal stories. "If, let’s say, JP Morgan is spinning up the ring, then fundamentally they’re going to have the keys, in which case then it’s their compliance requirements." Whoever holds the keys carries the duty.

Fhenix puts it in one line worth keeping: "Privacy isn’t a permanent identity. It is contextual." Nobody should see your salary; collateral in a lending protocol is visible by design. Same wallet, same day.

Why screening beats a ban

The fear goes like this: if a payment cannot be traced, a private blockchain can launder anything. Laundering runs on mixing. Dirty money has to be blended with clean money and taken out somewhere it will be accepted. So the middle of the chain is not what matters. The entrance and the exit are.

Put screening on every entrance and exit and mixing turns slow and expensive. Money that arrived from a known bad address simply does not turn back into ordinary money: no venue running those checks will take it. The hiding itself bothers nobody, because it protects the middle, and the ends stay visible anyway.

A ban does the opposite. It does not remove the coin, it removes the venues that watch it. The flow moves to places with no checks at all, and the ability to notice anything moves with it. So the choice is not between privacy and safety. It is between a flow under observation and a flow without one.

See for yourself

Open explorers for both networks work without registration. Worth a look at least once: you see how much a blockchain shows, and how little.

A Monero explorer gives you the block time, the size of the record in bytes and the fee, but no amounts and no addresses. In Zcash some payments will be fully open and some fully closed, depending on which address the sender picked.