Cardano achieves a milestone by deploying its first zero-knowledge (ZK) smart contract on the mainnet.ADA's price rises 5% to US$1.01, reaching a level not seen since mid-2022.Halo 2, an advanced zk-SNARK system integrated into Cardano, offers trustless setup, recursive proofs, and enhanced interoperability.Further development is needed to fully unlock the potential of zero-knowledge technology within Cardano's ecosystem.