Concordium is a proof-of-stake blockchain with identification built into the protocol to meet regulatory requirements, while delivering a user-friendly platform that can handle smart contracts. It utilizes zero-knowledge-proofs (ZKP) to allow parties to verify information without exchanging or storing that information on-chain, other than hash functions, so users can trust that their confidential business will not become anyone else's business. Concordium's unique ID disclosure mechanism enables regulators to revoke privacy and identify suspected bad actors and illegal transactions.