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.
YGGDRASH is a trust-based multi-dimensional blockchains (branches) built with a vision “Digitize everything into reality” and to connect everything and any blockchain networks. YGGDRASH’s main-net is called STEM, and its cryptocurrency is YEED. It is a trust-based blockchain ecosystem where each branch is governed by reputation to ensure integrity.