A new feature we’ve recently added to Green is called Coin Control.

Coin Control allows you to individually select specific outputs to use as inputs in a transaction. Maybe you don’t want your local coffee shop to know how much bitcoin you spend at the grocery store and vice versa. Or you don’t want your colleague to know how much bitcoin you have after covering for dinner. Using Coin Control, you can label and segregate your funds without consolidating accidentally and harming your financial privacy.

A dust attack is when an attacker sends a very small amount of bitcoin to one of your addresses hoping you will consolidate that output into your larger holdings.

Consolidating this output reveals to the attacker how much bitcoin you truly own. Green automatically detects these attacks and labels the “dust” outputs so you don’t accidentally commingle them into your larger bitcoin stack.