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Every page on COIN Online

Guides, explanations and reference pages for COIN, the private digital currency. Your money. Your business.

Getting started

What is COIN?Coin is private digital cash. You can pay anyone, anywhere, and the blockchain never shows who paid whom or how much.
Getting Started with COINNo account to open, no sign-up and nothing to configure. If you can install an app, you can use COIN.
Set Up Your WalletDownload it, open it, create a wallet. The COIN Wallet does the rest: it starts its own node and connects to the Coin network by itself.
Send and Receive COINTo get paid, share your address. To pay, paste someone else's and press Send. Your wallet keeps every payment private for you.
Back Up Your SeedYour 25 words are your wallet. Write them down once, keep the paper safe, and a broken or stolen computer can never cost you your coins.
Restore a WalletLost your computer, or forgotten your password? With your 25 words you can bring your wallet back on any computer, coins and all.
Accept COIN PaymentsTake payments for goods, services or donations. Give each customer their own address and every payment is easy to match, while your sales stay private.
Stay SafeCoin keeps your payments private. Keeping your coins safe is up to you, and it comes down to a few simple habits.

How COIN Privacy WorksOn a transparent blockchain, every payment publishes who sent it, who received it and how much moved. Anyone can follow the money, permanently.
Ring SignaturesEvery Coin payment is signed by a group of 16 possible senders. Anyone can check that one of them signed. Nobody can tell which one.
Stealth AddressesHand your address to anyone, or post it anywhere. It never appears on the blockchain: every payment to you lands at a new one-time address that only your wallet can recognize.
RingCT: Hidden AmountsEvery amount on Coin is sealed. The network still checks that no coins were made out of thin air, without ever seeing a single number.
Private by DefaultOutputs carry no visible history. No coin can be flagged, traced to an earlier owner or refused for where it has been.
Every Coin Is EqualMoney only works if every coin is worth the same as every other. On Coin, no coin carries a history that could make it worth less.
Private BalancesOn many blockchains, anyone who knows your address can see what you own and every payment you've made. On Coin, your address gives nothing away.

Prove What You ChooseShow that one transaction paid one address a specific amount, signed with a message such as an invoice number. Nothing else about your wallet is revealed.
Prove a PaymentPaid someone and they say it never arrived? A payment proof shows that one transaction paid their address, and how much, without revealing anything else.
Prove You Sent ItA spend proof shows that a transaction came from you. It doesn't reveal which of its 16 ring members was yours, the amount or anything else in your wallet.
Prove Your ReservesA reserve proof shows that a wallet holds at least a certain amount, without listing a single transaction. It's how exchanges and custodians can show they really hold their customers' coins.
Share a View KeyYour view key lets someone see the payments coming into your wallet without being able to spend a thing. Give it to your accountant, an auditor or a fundraiser's supporters.

The COIN WalletOne app does it all. It holds your coins, runs your own node, mines and proves payments. Here's where to find everything.
Your Own Full NodeEvery COIN Wallet runs a full node. It keeps its own copy of the blockchain and checks every block itself, so you never have to trust anyone else's server.
Download COINEvery download includes the full node, so your wallet checks the blockchain itself instead of trusting someone else's server. The miner is built in too.
Install COIN on WindowsDownload it, check it, unzip it, open it. It takes about five minutes, and there's no installer to click through.
Install COIN on LinuxThe Linux release has the node and the command-line wallet. A handful of commands and you're on the network.
Build COIN from SourceCoin is open source. Build it yourself and you know exactly what you're running.

Mining COINMining is built into the COIN Wallet. Choose how many CPU threads to give it and press Start mining. That's all there is to it.
RandomX-v2Coin's proof of work runs random programs that suit the processor already in your computer, so mining stays open to everyone instead of a few chip makers.

The Coin NetworkCoin runs on a network of nodes: ordinary computers that each keep a copy of the blockchain and pass new payments and blocks along. There's no central server, and nobody in charge.
Run a NodeYour wallet already runs a node while it's open. Keep one running around the clock and you help new users sync and keep the whole network strong.
Remote NodesIf a computer can't run its own node, the COIN Wallet can use someone else's. It's quicker to get going, but it means trusting that node with a little information.
Coin over TorCoin already hides who paid whom and how much. Tor hides one more thing: where on the internet your payments come from.

COIN SpecificationCoin is built on Monero v0.18, one of the most studied privacy codebases, and runs as a completely separate network with its own genesis block.
The Genesis BlockEvery blockchain starts somewhere. Coin's first block dates from 20 October 2026, and it carries a short message.
COIN User GuidesStep-by-step guides for everything you can do with COIN, starting with the basics.
COIN Common QuestionsShort answers to the questions people ask most, with links to the full guides.