Zcash is updating its network on Tuesday with the Ironwood upgrade, specifically at block 3,428,143. This will affect its largest private transaction pool, meaning you’ll be able to send funds *out* of the pool, but not transfer them internally within it. Your funds will remain secure.
The mining pool currently has 3.76 million ZEC, which is valued at around $1.89 billion – about 22% of all ZEC currently available. Developers state that the majority of ZEC holders don’t need to take any action at this time.
What Changes for ZEC Holders on Tuesday
Take your time – your funds are secure within the protected pool. You can continue using your current address, as the new pool is designed to work with it.
Wallets are still being developed to manage your money. If your wallet isn’t finished yet, it might appear as though your funds aren’t moving.
Zcash node operators need to update their software by Tuesday. They must install version 6.0.0 of Zebra, released by the Zcash Foundation, as this update activates a critical network change.
Occasionally, cryptocurrency exchanges might temporarily stop letting users deposit or withdraw funds. The people building the technology explain this usually indicates a delay on the exchange’s side, and doesn’t mean there’s a problem with Zcash itself.
As a researcher on this project, I’m excited to share that our new liquidity pool includes a safeguard against potential threats from quantum computers. Essentially, if quantum computing ever advances to the point where it can break current encryption methods, the funds held in this new pool would have a path to recovery. Unfortunately, funds remaining in our older pools wouldn’t have that same protection. It’s important to note, though, that this isn’t complete, future-proof quantum protection, but a significant step forward.
The One Mistake That Can Expose Your Balance
When funds are transferred from the previous system, the transaction amounts are visible to everyone. However, the identities of both the sender and receiver remain private.
It seems pretty secure at first glance, but there’s a hidden issue. Your digital wallet connects to an online server, which can then see your computer’s IP address.
Put the two together and someone can tie your balance to you.
According to Zooko Wilcox, the founder of Zcash and author of its user guide, the most crucial step for anyone considering a switch to a new system is establishing strong network privacy – like using tools such as Tor or Nym – first.
He suggests prioritizing privacy by enabling Tor or Nym before anything else. After that, only move funds from your wallet when the wallet provider confirms it’s secure.
Zcash Ironwood is launching soon! On July 28th, moving your private ZEC funds could potentially reveal your IP address and balance. While Zcash offers strong privacy for transactions, this can be compromised at a fundamental network level. Fortunately, a solution using Nym is now available. #Zcash $ZEC
— Nym (@nym) July 27, 2026
He also warned about scammers. Some are already pretending to be Ironwood migration support.
Why Zcash Is Locking the Old Pool
Taylor Hornby, a researcher at Shielded Labs, discovered an error in May. The bug affects the calculations that verify Orchard payments.
The bug could have let someone print fake ZEC. Nobody would have noticed.
The Zcash Open Development Lab (ZODL) quickly fixed the problem, but the price of ZEC still fell by over 30%, dropping to as low as $385.80 after news of the counterfeiting bug spread.
The real challenge was proving Orchard hadn’t created counterfeit money. He concealed everything so well, making it impossible to demonstrate that no fakes existed.
Ironwood solves this problem. Now, funds can only exit the original system through a controlled checkpoint. This checkpoint keeps track of everything and ensures that no more ZEC leaves than was originally deposited.
Fake coins, if any exist, are stuck inside forever.
Instead of simply asking users to switch from an outdated system, we’re requiring wallets to use the new system for Orchard transactions,” explained Sean Bowe and Dev Ojha in a joint statement from Project Tachyon and Valar Group.
Outside auditors and formal verification work back the fix.
Zcash Had This Exact Problem in 2018
This happened again. Back in March 2018, security expert Ariel Gabizon discovered a flaw in Sprout – Zcash’s original privacy-focused mining pool – that allowed for the creation of fake coins.
For nearly a year, the company didn’t say anything about the problem. They quietly included the solution with an update to Sapling in October, and then finally shared the complete details in February 2019.
The recent solution prevented the creation of any more counterfeit coins, but it couldn’t verify whether previous fakes already existed. The project, known as Sprout, was then abandoned.
After eight years, 22,747 ZEC tokens remain untouched. No one has ever attempted to access them, and this lack of activity is now the strongest evidence that the system wasn’t compromised or manipulated.
| Sprout, 2018 | Orchard, 2026 | |
|---|---|---|
| Bug found | March 2018 | May 2026 |
| Made public | 11 months later | Within days |
| How it was fixed | Quietly, inside Sapling | Patch, then Ironwood |
| Old pool | Left open, moving optional | Locked, moving required |
| ZEC involved | 22,747 still stuck | 3,765,594 to move |
Ironwood takes a different approach after this experience. Instead of forcing anyone to abandon their current routines, or encouraging them to stick around, it simply offers a new option without pressure.
What to Watch Over the Next 30 Days
You can now watch the move happen. ZODL’s dashboard shows funds leaving Orchard block by block.
If users don’t spend their ZEC quickly, a large amount remains unused. However, if everyone spends it all at once, it becomes easier to verify the supply, but reduces the level of privacy.
On Monday, ZEC was trading around $506. Recent Zcash price data shows it’s increased by roughly 4% in the last day and 22% over the past month. Over the last year, its value has soared by more than 1,100%, which earned it a place on Forbes’ list of top performers for 2026.
The code looks ready. The real test is whether the exchanges are.
2026-07-27 19:08