What is Zcash (ZEC)? The Privacy Coin Using Zero-Knowledge Proofs

Zcash is a privacy-focused cryptocurrency that enables users to hide key details of transactions by leveraging zk-SNARKs.

In brief

• Created in response to Bitcoin’s perceived limitations, Zcash offers privacy with zk-SNARK tech.
• Like Bitcoin, Zcash employs a proof-of-work consensus algorithm, but allows transactions to be either transparent or shielded.
• A decade on from its creation, Zcash is one of the privacy coins fighting for private, and decentralized payments.

For many years, Bitcoin was used to buy drugs online because it was believed to be anonymous. Turns out, it’s surprisingly easy to track Bitcoin transactions. Zcash, on the other hand, is a cryptocurrency that promised something Bitcoin couldn’t deliver: privacy.

How Zcash works

Zcash is designed to hide key transaction details, such as the sender, recipient, and amount. By using cryptographic techniques, transfers can be made that can’t easily be traced on a public ledger while remaining verifiable by the network.

Zcash allows transactions to be either transparent, like Bitcoin, or private using zero-knowledge proofs known as zk-SNARKs. This cryptography verifies that a transaction is valid without exposing the sender, recipient, or amount. It is a fungible cryptocurrency when coins are fully shielded, meaning tokens in the private pool are not linked to transaction history. However, most Zcash coins exist in the transparent pool, which, like Bitcoin, maintains a visible history.

The network maintains two pools of addresses: transparent (t-addrs) and shielded (z-addrs). Wallets such as ECC’s Zashi now default to shielding funds, encouraging greater privacy.

Who invented Zcash?

Zcash launched in October 2016 as a privacy-focused cryptocurrency developed by the Electric Coin Company (ECC), led by Zooko Wilcox-O’Hearn, drawing on research from Johns Hopkins, MIT, Tel Aviv University, and other institutions. Like Bitcoin, Zcash (ZEC) has a maximum supply of 21 million coins and block reward halvings every four years.

While ECC initiated Zcash, it does not own or control the blockchain. All upgrades require community approval, keeping development decentralized and open rather than directed by a single entity.

Did you know?

At its launch, Zcash relied on a “trusted setup ceremony” in which six participants each generated and destroyed a portion of a private key. This prevented anyone from being able to counterfeit ZEC.

In April 2022, Edward Snowden was revealed as one of the participants in the ceremony. "He did it as a service, as a public good, and believing in privacy," Josh Swihart, former CEO of the Electric Coin Company, told Decrypt.

Key dates

• May 2013: Zerocoin proposal at Johns Hopkins marks the start of privacy-focused crypto research that leads to Zcash.
• January 2016: Zooko Wilcox formally announces the Zcash project as a privacy-oriented Bitcoin fork.
• October 2016: Zcash launches after its trusted setup ceremony, and the network goes live. Zcash reached an all‑time high of $5,941.80.
• October 2018: The Sapling upgrade activates, improving the speed and efficiency of shielded transactions.
• December 2019: The Blossom network upgrade takes place, increasing block frequency.
• November 2020: Zcash goes through its first halving.
• May 2022: Network Upgrade 5, including the Orchard upgrade, rolls out, reducing reliance on earlier complex setup “ceremonies” for new shielded pools, and allowing Zcash users to make private digital cash payments on mobile phones with a new address format called unified addresses.
• April 2022: Edward Snowden is publicly revealed as “John Dobbertin,” a participant in the original launch ceremony who contributed to the trusted setup but was not an architect.
• November 2024: The second Zcash halving takes place.
• January 2026: The Zcash Foundation announces that the SEC has ended its investigation into the nonprofit without recommending enforcement action.
• January 2026: The CEO of the Electric Coin Company announces that his entire team was “constructively discharged” following a disagreement with its non-profit board members.
• May 2026: Security researcher Taylor Hornby discovers a “critical counterfeiting vulnerability” in Zcash's Orchard privacy pool using Anthropic's Claude Opus 4.8.
• June 2026: Zcash developers deploy an emergency fix after coordinating a confidential response across the ecosystem. Public disclosure of the four-year-old flaw triggers a sharp selloff in ZEC and renewed debate over the tradeoffs between privacy and auditability.
• June 2026: Zcash founder Zooko Wilcox proposes the Ironwood upgrade to enable users to independently verify the cryptocurrency's circulating supply.
• November 2028: Zcash's third halving is scheduled to take place.

How is Zcash produced?

Zcash, like Bitcoin, uses proof-of-work (PoW) to validate transactions, but it runs on the Equihash algorithm—a memory-hard hashing function designed to make mining fairer and more resistant to ASIC hardware, and the consensus mechanism Zcash originally adopted to secure its network.

Currently, Zcash miners receive 80% of each block reward, while 20% goes to development funds that support the Electric Coin Company (ECC), the Zcash Foundation, and community grants. This development funding structure is governed by community decision and is set for renewal or revision after the upcoming halving.

Zcash is a peer-to-peer cryptocurrency designed for everyday payments. Users can choose between transparent transactions that are regulator-friendly and shielded transactions that enhance privacy. This optionality has helped Zcash remain listed on more major exchanges than some other privacy coins, such as Monero, which are avoided by certain platforms due to regulatory constraints.

Bitcoin has heavily influenced Zcash. Like the number one cryptocurrency, Zcash is designed to be used for everyday purchases. Its various privacy features mean it can also be used to send or receive transactions hidden from prying eyes.

Zcash, regulators and law enforcement

Around the world, regulators and law enforcement agencies have increased scrutiny of privacy coins, arguing that their anonymity features can be misused for money laundering or sanctions evasion. In the United States, the Treasury Department’s Financial Crimes Enforcement Network has proposed tighter rules for “anonymity-enhanced cryptocurrencies.”

“Several types of [anonymity-enhanced cryptocurrencies]—including Monero, Zcash, Dash, Komodo, and Beam—are growing in popularity and use technologies that make it difficult for investigators to trace blockchain transactions or connect them to individuals involved in illicit activity,” regulators wrote in 2020.

As enforcement of the cryptocurrency market ramped up, exchanges began delisting privacy coins. In November 2020, privacy-centric exchange ShapeShift delisted Monero, Dash, and Zcash to limit the company’s regulatory risk, reintroducing Zcash in December 2025 and officially integrating Zcash shielded transactions in February 2026. In 2023, OKX delisted delisted Zcash, Monero, and Dash—only to relist Zcash in November 2025 during the cryptocurrency's price surge. As of 2026, Zcash was still listed on Binance, but in April 2025, it was added to the exchanges' list of cryptocurrencies that the community could vote on to delist.

Orchard vulnerability disclosure

In May 2026, the disclosure of a “critical counterfeiting vulnerability” in Zcash’s Orchard shielded pool raised questions over supply integrity, privacy tradeoffs, and the growing impact of artificial intelligence on the blockchain industry.

On May 29, 2026, independent security researcher Taylor Hornby discovered a critical vulnerability in Zcash’s Orchard privacy pool using Anthropic’s Claude Opus 4.8. The flaw could have allowed an attacker to create unlimited counterfeit ZEC within the network’s shielded transaction system. After the exploit was revealed, Zcash developers deployed an emergency fix after coordinating a confidential response involving protocol developers, miners, exchanges, and other ecosystem participants.

On June 3, 2026, the Zcash Foundation disclosed the vulnerability and completed a network upgrade that restored Orchard functionality using corrected cryptographic circuits. Developers said there was no evidence the flaw had been exploited and that the overall ZEC supply remained intact.

Despite assurances that the exploit was fixed and not used by an attacker, public disclosure of the four-year-old vulnerability wiped billions of dollars from the privacy coin's market capitalization.

Because Orchard transactions are shielded, developers acknowledged that there is no definitive cryptographic way to determine whether counterfeit coins were created before the bug was fixed. To address those concerns, a week after the exploit came to light, Zcash founder Zooko Wilcox proposed an upgrade called Ironwood that would allow users to independently verify the cryptocurrency's circulating supply.

The Zcash exploit revelation became part of a broader discussion about frontier AI models as vulnerability-discovery tools, with security researchers warning that increasingly capable systems could accelerate both defensive security research and increase the discovery of exploitable software flaws.

The future of Zcash

With regulators tightening surveillance of digital assets and privacy coins facing mounting scrutiny, Zcash is entering its most pivotal period yet. A halving, a major funding overhaul, and a migration to new software are converging to test whether a privacy-focused cryptocurrency can survive under pressure.

Nearly a decade after its launch, Zcash returned to the spotlight for market reasons. In November 2025, the token surged to a high of $698.87, according to CoinGecko data.  Its rise was fueled in part by prominent figures on social media highlighting Zcash’s community, privacy design, and technical improvements.

By December 2025, Zcash was again in the spotlight and seeing renewed institutional interest, including Zcash founder Zooko Wilcox taking an advisory role at a firm building a large ZEC treasury.

In January 2026, Zcash entered a turbulent stretch marked by sharp price swings, internal conflict, and regulatory development, with the Zcash Foundation announcing that the U.S. Securities and Exchange Commission had closed a long-running investigation without recommending enforcement action.

What excitement the SEC decision may have drawn was short-lived. In early January, the entire team at Electric Coin Company said it had been “constructively discharged” following a  disagreement with the majority of Bootstrap’s board members, a 501(c)(3) nonprofit created to support Zcash.

Following their departure, former ECC CEO Josh Swihart announced that he and his former colleagues would launch a new project, cashZ, set to focus on full-stack Zcash development including a new Zcash-focused wallet.

Elsewhere, independent Zcash development group Shielded Labs, whose contributors include Zooko Wilcox, received approximately $1.16 million in funding from Gemini and Facebook founders Tyler and Cameron Winklevoss, with the goal of "strengthening the long-term security, sustainability, and scalability of the Zcash network."

Zcash’s next halving is scheduled for November 2028. The current development fund ends at the same time, and the community is debating new mechanisms. ECC is deprecating the C++ full node “zcashd” in favor of the Rust-based “zebrad,” with a new wallet called Zallet also in development.

These changes will shape Zcash’s cryptography, funding model, and user experience for years ahead.

This article was updated in June 2026 to reflect recent developments.

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