CoinJoin
CoinJoin: Bitcoin Transaction Mixing
CoinJoin combines multiple Bitcoin transactions into single transactions to obscure the connection between inputs and outputs. It's like mixing your laundry with other people's to make it harder to tell which clothes belong to whom.
CoinJoin is a Bitcoin privacy technique that combines multiple transactions from different users into a single transaction, making it difficult to trace which inputs correspond to which outputs. This improves transaction privacy without requiring protocol changes.
How CoinJoin Works
Transaction combination merges multiple users' Bitcoin transactions into single larger transactions with many inputs and outputs.
Input-output obfuscation makes it unclear which transaction inputs fund which outputs, breaking transaction traceability.
Coordination mechanisms enable multiple users to coordinate CoinJoin transactions without trusting each other or central coordinators.
[IMAGE: CoinJoin process showing multiple separate transactions combining into single mixed transaction with unclear input-output relationships]
Real-World Examples
- Wasabi Wallet providing built-in CoinJoin functionality for Bitcoin privacy enhancement
- Samourai Wallet offering CoinJoin mixing services through their Whirlpool implementation
- JoinMarket enabling users to earn fees by providing Bitcoin for other users' CoinJoin transactions
Why Beginners Should Care
Privacy enhancement for Bitcoin transactions that are otherwise completely transparent on the public blockchain.
Regulatory attention as mixing services face scrutiny and potential restrictions in various jurisdictions.
Fee considerations since CoinJoin transactions typically cost more than regular Bitcoin transactions due to their complexity.
Related Terms: Bitcoin, Transaction Privacy, Mixing Service, Privacy