USDQ is a decentralized stable coin, which is backed by bitcoin and pegged to the dollar, so 1 USDQ = $1 USD.
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.