Zcash has activated its Ironwood network upgrade, introducing a new shielded pool designed to strengthen the security of private transactions and make the integrity of the circulating ZEC supply independently verifiable.
The Ironwood NU6.3 upgrade went live Tuesday at block height 3,428,143. The upgrade also introduced a new transaction format supporting the Ironwood shielded pool.
Ironwood was developed following the discovery of a critical soundness vulnerability affecting Orchard, Zcash’s previous shielded pool.
Security researcher Taylor Hornby discovered the vulnerability on May 29 and privately disclosed it to Zcash developers. The issue affected the zero knowledge proof system used to validate Orchard transactions.
There is no evidence that the vulnerability was exploited, that user funds were affected, or that Zcash’s total supply increased.
