If someone needs to prove something to a regulator or business partner, they can share a special “viewing key” that unlocks just that information, without handing over control of their money. A full viewing key can reveal incoming transactions and the details of standard outgoing payments to whomever it’s shared with. Disclosure becomes something the user grants selectively rather than something the network forces on everyone by default.
Interestingly, the idea predates Zcash by years. Bitcoin’s own creator, Satoshi Nakamoto, mentioned this style of cryptography in a 2010 online post, though they admitted they didn’t see how to apply it to Bitcoin at the time.
The numbers suggest people are actually using this feature, not just holding the coin. Shielded transactions have grown sharply over the past two years, even as ordinary transparent transactions stayed flat. Around 4.9 million Zcash (ZEC) — close to 29% of all coins ever mined — now sit in the shielded pool. Meanwhile, ZEC’s price rose roughly 2,300% between September 2025 and September 2026. Grayscale launched a spot Zcash investment product on the NYSE in August 2026, and it attracted nearly $1 billion in assets in just over a month.
Privacy also gets stronger as more people use it: every new shielded transaction adds to a shared pool of activity that makes it harder to single out any one person. That’s different from a lot of tech features — usually more users just means more traffic, not better protection for everyone already there. And because you can’t “un-publish” a blockchain, privacy has to be built in from the start; it can’t easily be bolted on later. Zcash keeps refining its design — an upgrade called Ironwood, released in July 2026, replaced part of the system’s cryptographic engine and fixed a known security issue.
