Input Mixing

Input mixing is a technique used to obfuscate the origin of funds by pooling multiple transactions together and shuffling them before distributing them to the intended recipients. By combining the inputs of several users into a single transaction, it becomes difficult for observers to determine which input corresponds to which output.

This effectively breaks the deterministic link between the sender and the receiver on the blockchain. This method is often implemented through decentralized mixing protocols or coin join services.

While it significantly improves privacy, it is also a focus for regulators who categorize such services as high-risk due to their potential use in obfuscating the source of funds. The effectiveness of mixing depends on the volume of participants and the frequency of use within the pool.

It serves as a practical, albeit controversial, method for enhancing transaction confidentiality.