UTXO Model Privacy

The UTXO model, used by Bitcoin and similar protocols, inherently leaves a trail of transaction history that is visible to all participants. Because each transaction consumes existing unspent outputs and creates new ones, the history of every asset can be traced back to its origin.

Privacy in this model is largely dependent on the user's ability to manage their address usage and avoid linking their activity to real-world identities. While techniques like CoinJoin can help, the fundamental design of the UTXO model makes it more transparent than account-based models.

This transparency is a key feature for auditability but poses significant challenges for individual privacy. Understanding these structural constraints is essential for any participant concerned with on-chain data leakage.