Lelantus

Basics

• A protocol design for private transactions. Was created by ZCoin's cryptographer Aram Jivanyan, after their Zerocoin protocol was broken.
• The Lelantus paper was first published by Aram in December 2018.
• From the Lelantus website (10-2019):

"We propose a new protocol for private financial transactions on the blockchain which ensures the privacy of both transaction values and their origins without a trusted setup. By combining different techniques from the confidential transaction protocol of Greg Maxwell, the Zerocoin Protocol and One-out-of-Many Proofs of Groth et al., we propose a new system, Lelantus, that provides both anonymity and confidentiality of transactions."

Beam implementation

• From this blog post (26-9-2019):

"The technology caught our attention in July 2019, and Vlad Gelfer, our core dev, started studying it and finding ways to adapt it to Mimblewimble. As we started working on Lelantus, it became clear that it greatly improved privacy. The result of this work is a special Mimblewimble-adapted flavor of Lelantus that we called simply Lelantus-MW. For more details on the protocol and how it is different from the original Lelantus, read our Wiki article here. The PoC implementation of Lelantus-MW can be found here, it is still work-in-progress.

We would like to thank Aram, Reuben and the Zcoin team for the friendly cooperation, and we hope to continue working together to make Lelantus better for everyone. 

We will go on working on Lelantus-MW and plan to fully implement it on Testnet before the end of 2019 and release Lelantus-MW on mainnet in early 2020"