What Are Privacy Coins and Are They Legal?

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Monero is one of the only privacy coins that is private by default. Unlike Zcash, you can’t turn its privacy functions off. To hide transaction data, Monero uses one-time-use “stealth addresses” for each transaction; “ring signatures”, which group genuine transactions with old “decoy” transactions to make it difficult to work out which transaction is legitimate, and “ringCT”, which hides the amount of Monero sent in a transaction.