Zcash is a privacy-focused Layer 1 blockchain and cryptocurrency that enables confidential transactions through zero-knowledge proofs (zk-SNARKs). Users can choose between transparent and shielded transactions, providing optional privacy while preserving decentralization and security. Following the discovery of a vulnerability in the Orchard shielded pool, the upcoming Ironwood upgrade introduces a new shielded pool, strengthens supply integrity through Zcash’s turnstile mechanism, and allows users to migrate funds securely. The upgrade aims to maintain ZEC’s bounded supply while preserving the protocol’s industry-leading privacy guarantees.