What is CryptoNote and how does Monero use it?
CryptoNote is a set of rules for building digital money with privacy built in. Monero started with those rules and has improved them over time, so your payments can be checked by the network without publicly revealing who paid whom or how much was sent.
CryptoNote is a blueprint, not a coin
Think of CryptoNote as a blueprint for how a cryptocurrency should work. It describes how payments are created, recorded, and checked, with a special focus on making them difficult to trace.
A cryptocurrency’s blockchain is its shared record of transactions. On many public blockchains, you can follow money between visible addresses. CryptoNote was designed to make that kind of tracking much harder.
Monero launched on April 18, 2014, as a fork of Bytecoin—meaning it started from a separate version of Bytecoin’s software. Bytecoin used the CryptoNote protocol, or shared rule set. Monero’s original creator used the name thankful_for_today.
You do not buy or mine “CryptoNote” itself. You use a cryptocurrency, such as Monero, that grew from its design.
How Monero uses its privacy ideas
Two important ideas Monero inherited from CryptoNote are stealth addresses and ring signatures.
Stealth addresses help protect the recipient. When someone pays you, their wallet creates a unique, one-time destination on the blockchain, derived from your wallet address. Your wallet can recognize and spend that payment, but an outside observer cannot simply search your public address to see every payment you have received.
Ring signatures help protect the sender. When you spend Monero, your wallet places the output you are spending among other possible outputs. An output is a piece of cryptocurrency created by an earlier transaction.
The signature proves that one member of that group authorized the spend, without revealing which one.
Monero also uses a key image, a unique cryptographic marker for a spent output. This lets the network reject attempts to spend the same money twice without exposing which ring member was actually spent.
What Monero added beyond the original design
Modern Monero is not simply the original CryptoNote software with a new name.
A major addition is Ring Confidential Transactions, usually called RingCT. It hides transaction amounts while still letting the network verify that a transaction does not create money out of nothing. The original CryptoNote design did not hide amounts this way.
Together, Monero’s main privacy tools protect different details:
- Stealth addresses: make payments difficult to link to the recipient’s public address.
- Ring signatures: obscure which earlier output is being spent.
- RingCT: hides the amounts being transferred.
These protections apply automatically to ordinary Monero payments. Still, privacy is not a promise of invisibility. Sharing wallet details, using an identifying exchange account, or exposing information outside the blockchain can weaken your privacy.
The bottom line
CryptoNote provides Monero’s privacy foundations, not its current mining algorithm. Monero originally used CryptoNight-based mining, but switched to RandomX, a mining algorithm designed to favor computer processors, on November 30, 2019.
Whether you mine through a browser service or use dedicated mining software, that distinction matters: RandomX governs the mining work, while Monero’s evolved CryptoNote-based transaction rules help protect payments and keep spending valid. A browser service does not create those privacy protections; the Monero network does.
