Zcash Advances Quantum Readiness With Ironwood’s Shielded Notes Upgrade
Fintech
Security
blockchain privacy
Cryptocurrency Security
Ironwood Upgrade
post-quantum cryptography
Quantum Recovery
quantum security
Shielded Notes
Shielded Transactions
ZCash
Zcash NU6.3
ZEC
ZIP 2005
TLDR: Zcash’s Ironwood upgrade activated on July 28, 2026, at block 3,428,143, opening a new shielded pool. Ironwood notes use plaintext marker 0x03, replacing Orchard’s 0x02 format to prepare for future recovery. ZIP 2005 reserves marker 0x0A for PRF-expand, but it does not make shielded transactions quantum-resistant. Recovery remains unfinished, while Sprout, Sapling and Orchard [...]
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Source: Source: Blockonomi