Monero uses ring signatures , ring confidential transactions , and stealth addresses to obfuscate the origins, amounts, and destinations of all transactions . All outgoing transactions are mixed together in a way that makes it extremely difficult and nearly impossible to determine where funds were originally sent.
Monero is fungible . It cannot be blacklisted by exchanges or vendors due to its association in previous transactions. Monero will continue to exist regardless of its origin or previous use, and thus is seen as a cryptocurrency that will always keep your money safe.
Ring Signatures and Ring Confidential Transactions (RingCT) are privacy features made available through the use of cryptography. This allows Monero users to make completely private and unlinkable transactions while still allowing for the network to validate the transaction was authorized by the sender through the use of a key pair. The sender uses their key pair to create a ring signature which mixes their output with other transaction outputs, making it exponentially more difficult to determine which transaction is the real one (more info on this later).
Monero also uses stealth addresses . Stealth addresses are like anonymous public accounts. Users can publish a single stealth address, from which any sender can send XMR without needing their wallet to be publicly advertised. This means that your Monero balance isn't tied to your IP or identity : use Monero at home, at work, or even on the go! Because of ring signatures and ring confidential transactions, no third party will know how much you've sent, where you've sent it to, nor who you've sent it to.
How Monero works: mining CryptoNote mining allows users with basic home computers to take part in network consensus by securing the blockchain. Unlike Bitcoin, CryptoNote's mining algorithm is designed to be suitable for ordinary PC CPUs rather than ASIC rigs, which makes it more decentralized. With Monero's ring signatures and stealth addresses, the actual sender of a transaction remains anonymous even when their address can be discovered by others.
How Monero works: fungibility A defining feature of any cryptocurrency is its ability to remain fungible , or interchangeable with other units of the same currency, ensuring that each user can negotiate on equal terms with another without being aware of their respective holdings.
It becomes immediately apparent that Bitcoin failed this task due to an epidemic of blockchain analysis companies such as Chainalysis . By allowing these third parties access to your financial information without your consent, you are forced into playing by their rules.
Monero does not share these problems with Bitcoin. Monero's ring signatures, ring confidential transactions, and stealth addresses make it impossible to associate a transaction with its originator through blockchain analysis . The only way to determine the sender of a transaction is for an outside observer to obtain all outputs from one or more recent transactions, which are then combined mathematically to determine the senders of those outputs in an attempt to find common inputs between two outputs (which amounts to computationally undoing the mixing process). This would require tremendous power over the network that no single entity can feasibly obtain. How Monero privacy compares To give you an idea of how effective privacy features are compared to other cryptocurrencies, I've made this handy little chart.
How Monero compares to other cryptocurrencies Chains can be used when transactions are made publicly available. When a transaction is made, it's linkable—you can see the inputs and outputs in real time. Anyone with access to the blockchain can "see" how much money is in any address . This allows anyone else to know exactly who has paid whom for what. BitMixer wouldn't tell you anything about an output because xmr2btc protects its users' addresses from being linked back to their actual balances by using ring signatures , stealth addresses , and one-time keys. If Chainalysis wants to spy on your Monero account, they'd have to mine the entire chain, which could take decades depending on network hashrate.