Polis is a new digital currency supporting peer-to-peer transactions without an intermediary. These transactions are verified by the network, approved by consensus and recorded in a public ledger. Supports: Instant transactions, Decentralized Governance, Proof-of-Work, X11 Algorithm encryption.
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.