2019 was not an extraordinary year for PIVX. From the beginning of the year, PIVX was already running into issues with its Zerocoin protocol. In January, possible fixes were rolled out to address the “Fake Stake” vulnerabilities and by April, the project had deactivated its zPIV feature. Multiple blockchain projects using the same protocol were also affected.

In what appears to be a comeback, PIVX has announced its plans to implement ZCash Sapling on its next major core wallet release. The zk-SNARKs-based privacy protocol was created by Zcash and will enable both private and public transactions on the PIVX blockchain. The Sapling protocol is a combination of Groth16, zk-SNARKs and zero-knowledge proofs.

Sapling is a network upgrade that introduces significant efficiency improvements for shielded transactions that will pave the way for broad mobile, exchange and vendor adoption of Zcash shielded addresses.

PIVX’s move to implement Sapling is due to the protocol’s highly-researched status and advanced technical characteristics. Some of the improvements of Sapling include performance shielded addresses, faster verification times, a higher privacy level, enhanced usability and overall higher potential.

In comparison with the previously used Zerocoin protocol, Sapling shares the same zero-knowledge concept but has been extended by creating a framework over zk-SNARKs to chain several statements in a single mathematical circuit that can be proven in a zero-knowledge manner.