May 2022 — NU5 / Orchard activates Halo 2, killing the trusted setup

2022

Network Upgrade 5 deploys the Orchard shielded pool built on the Halo 2 proving system (block 1,687,104). It permanently removes the need for any trusted setup and enables recursive proofs for future scalability — the goal Zcash had chased since the Ceremony.