EUNO uses the DARKSEND options provided by the masternodes to mix together coins from different transactions on to a new address to remove the original senders traces to the 3rd party. 

Darksend is based upon "CoinJoin", an anonymization method for Bitcoin transactions proposed by Gregory Maxwell. It is based upon the following idea: “When you want to make a payment, find someone else who also wants to make a payment and make a joint payment together.” When making a joint payment, there is no way to relate input and outputs in one bitcoin transaction and thus the exact direction of money movement remains unknown to third parties. Darksend improves upon this original idea, through the process of decentralized coin mixing.