One of the three key changes coming to the Private Instant Verified Transaction – or PIVX – network is the implementation of the Zerocoin Protocol for more secure end-to-end transaction anonymity. PIVX will be the first Proof of Stake coin with the Zerocoin Protocol which aims to ensure that every end-to-end transaction becomes entirely untraceable.
Read more here: https://themerkle.com/pivx-set-to-implement-three-top-developmental-changes/