One address, unlimited one-time destinations
Every time someone sends Monero Coin (XMR), payment ends up at an address that the recipient has never actually disclosed.
Stealth addresses are a core component of Monero's privacy model. It requires the sender to create a random one-time address for each transaction on behalf of the recipient.
This way, a public address can receive unlimited payments, and no two transactions will share a visible location on the blockchain.
Three keys ensure the operation of the system. The public address is the address shared by the recipient. Private view keys allow wallets to detect transactions received. The private spending key then authorizes the transfer of funds.
View the key allows the holder to access all invisible addresses associated with the wallet, but cannot spend funds from these addresses.
The recipient uses its own private key to scan all transactions, reconstruct the target address, and accept payment when matched. Senders and recipients never interact directly, but each recipient must scan the entire ledger to find the payments received.
This is why wallet synchronization takes time: there is no quick query method, and only a comprehensive scan of every transaction on the network can be performed.
Stealth addresses ensure that transactions cannot be traced back to the recipient's actual address. When a third party observes a blockchain, they can only see the one-time public key and cannot associate it with a known wallet or identity.
Transmitter privacy is also evolving
Receiver privacy through stealth addresses has existed since Monero was introduced. Senders privacy has historically relied on a ring signature mechanism, which hides every true expense in a small group of decoys.
When users initiate transactions, their signatures are included in a signature ring, making it difficult for observers to computationally determine which participant is the actual sender.
This system is now being replaced. The upcoming FCMP++(Full Chain Member Proof ++) upgrade will replace the original ring signature with a more powerful zero-knowledge proof system. When fully deployed, every Monero transaction will be hidden in every output ever created on all chains, with currently more than 150 million unspent transaction outputs (UTXOs).
As chains grow, fixed ring sizes reduce privacy over time, and advanced chain analysis techniques can sometimes narrow the range of possibilities. FCMP++ solves this problem by significantly expanding the anonymity set, making association attacks computationally infeasible.
Project Monero is working to apply this upgrade to the entire native output set, which means older output will also benefit from the expanded anonymous pool.

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