ARPA is a Secure Computation Network Compatible With Blockchains They propose a blockchain-based secure computation network of Multi-party Computation (MPC). ARPA cryptographically enables private smart contract, unprecedented data-at-use privacy protection, as well as scalable computational sharding.
ZumCoin- Simplified Private Digital Currency- is a robust blockchain technology designed to provide decentralized cross-border payments; faster, cheaper, and secure. It is an open-source project; being developed by a diverse team of technically competent individuals who are well-versed in distributed ledger technologies, cryptography, and economics. The project is aimed to develop a multi-layer robust blockchain ecosystem that is founded on three basic tenets: PRIVACY — FREEDOM — EQUALITY