Usually privacy, security and scalability is rare to get in a single cryptocurrency project but this is what Masari(MSR) has promised. The project was launched in 2017 as a fork of Monero. Its aim is to provide a scaling solution for all cryptocurrency notes as well as facilitate quick transaction online without privacy and efficiency trade-offs.
To achieve these it employs a proof of work Protocol with it's cryptographically sound ringCT and cryptonote protocol. It also uses uncle Mining via the SECOR protocol.
It offers a better scaling solution through the adoption of blocktree methodology which increases transaction throughput Thus allowing multiple blocks to be mined in parallel. Masari project is open source hence its software can be verified on GitHub.