Weeks after a critical vulnerability sparked a market rout and raised questions about Zcash's supply, the privacy-focused cryptocurrency has activated Ironwood, an upgrade designed to ensure any counterfeit coins can never enter circulation.
To address the vulnerability, Zcash founder Zooko Wilcox proposed Ironwood, which replaces Orchard with a new shielded pool and a "turnstile" accounting system that prevents more ZEC from leaving the old pool than was verifiably deposited. As a result, any counterfeit coins, if they exist, remain permanently trapped.
