Coin Mixer

A coin mixer (also called a tumbler) is a service that enhances cryptocurrency privacy by mixing a user's coins with those of other users, making it difficult to trace the origin and destination of funds. Mixers break the on-chain link between sender and receiver by pooling multiple transactions together. While legitimate for financial privacy, coin mixers have attracted regulatory scrutiny due to their use in money laundering. The US Treasury sanctioned Tornado Cash, an Ethereum-based mixer, in 2022.