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SecurityApril 8, 202613 min read

Bitcoin Privacy: How to Use Bitcoin More Anonymously

Bitcoin is not as private as you think. Every transaction is on a public ledger. This guide covers practical privacy techniques: CoinJoin, address hygiene, Tor, and common mistakes.

Bitcoin Is NOT Anonymous

Bitcoin is pseudonymous — transactions are linked to addresses, not names. But once your identity is connected to an address through a KYC exchange, every transaction linked to that address becomes traceable. Companies like Chainalysis specialize in this.

Why Privacy Matters

Financial privacy is not about hiding wrongdoing. Your employer does not need to know your net worth. A merchant does not need to see your entire balance. A burglar should not be able to look up your holdings from a transaction.

Technique 1: Never Reuse Addresses

Every time you receive Bitcoin, use a fresh address. Modern wallets do this automatically. Address reuse links all transactions to a single fingerprint.

Technique 2: CoinJoin

CoinJoin combines multiple transactions into one large transaction, making it difficult to determine which inputs correspond to which outputs. Wasabi Wallet has built-in CoinJoin functionality.

Technique 3: Run Your Own Node

When you use someone else's node, that operator can see your IP address and which addresses you query. Running your own full node means no one else sees your queries. Umbrel makes this easy.

Technique 4: Use Tor

When you broadcast a transaction, your IP address can be linked to it. Routing through Tor hides your IP. Wasabi Wallet routes all traffic through Tor by default.

Technique 5: Buy Without KYC

Bisq is a decentralized exchange that does not require identity verification. You trade peer-to-peer. The trade-off is less convenience and liquidity.

Common Privacy Mistakes

Consolidating coins from different sources links them permanently. Posting your address publicly links your identity forever. Using block explorers without Tor reveals your interest in specific addresses.

Perfect privacy is extremely difficult. But meaningful privacy — enough to prevent casual surveillance — is achievable with basic hygiene: no address reuse, a personal node, and Tor.

Deep dive in our Privacy and Anonymity module.

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