ARPA Chain proposes 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.

Secure Multi-party Computation (MPC) allows a set of parties to jointly compute a function over their inputs while keeping them private. The correctness of computation is verifiable even under majority malicious condition using secret sharing and information-theoretic Message Authentication Code (MAC).