Hush Protocol: The Privacy Layer of Solana

Blockchains were designed to be transparent. That transparency helped crypto earn trust. It also created the most sophisticated surveillance system ever built. Every transaction you make is permanently recorded. Every balance is visible. Every address is traceable. Your wallet is an open book to competitors, counterparties, attackers, and virtually anyone with a block explorer.

That works for verification. It doesn't work for finance. Hush fixes that.

Hush is the privacy layer of Solana, powered by Zenrock. It brings privacy to Solana without sacrificing yield, usability, or composability — and introduces a new idea: generating yield while remaining private. Solana is fast, cheap, and increasingly the default venue for DeFi. It is also fully public. Hush is built to make privacy the default foundation for the onchain economy.

Why Privacy, Why Now

Privacy isn't a feature anymore. It's becoming the narrative. On public blockchains, balances, income, and spending are visible by default. That breaks basic financial norms. No one expects their bank account, payroll, or net worth to be public just to participate in an economy. Without privacy, you lose safety, negotiation power, and true ownership. You get surveillance.

The market followed the shift. Zcash's shielded supply grew from roughly 11% to roughly 30%. Railgun crossed $30M TVL. a16z called privacy the key competitive advantage of 2026. Meanwhile, TradFi moved onchain with ETFs, institutional custody, and regulated exchanges. Capital came in — and surveillance infrastructure followed.

What Is Hush?

Hush is the privacy layer of Solana, built by Zenrock. Users shield assets into a shared pool. Balances become indistinguishable. Transfers become invisible. Withdrawals appear at any address with no onchain link to the original deposit. Outside observers see deposits and withdrawals. Everything in between is private.

The main shielded pool is denominated in JitoSOL. Assets continue earning yield while remaining private. Hush introduces no new token — all value flows back to $ROCK, Zenrock's network asset that secures the custody layer and captures fees from privacy and yield activity. As Hush usage grows, $ROCK aligns privacy adoption, yield generation, and network growth under a single asset.

Developers can build directly on Hush to create applications that inherit private balances, private transfers, and yield-bearing privacy by default.

Privacy That Compounds

Privacy tools have historically come with two costs: weak anonymity sets and idle capital. Hush removes both. Every deposit strengthens the anonymity set for everyone in the pool — the more participants, the stronger the guarantees. Privacy improves as participation grows.

The pool is denominated in JitoSOL. Shielded funds continue earning staking and MEV yield (~6–8%) while remaining private. No opportunity cost. As the pool grows, privacy and yield improve together.

How Hush Works

Shield

Deposit SOL or JitoSOL into Hush. Funds enter the shielded pool and you receive cryptographic proof of ownership. Onchain, observers only see that a deposit occurred.

Transfer

Send funds privately to other Hush users without leaving the pool. Observers cannot determine sender, recipient, or amount.

Unshield

Withdraw to any Solana wallet. Funds appear at the destination with no onchain link to the original deposit. Partial transfers and withdrawals are supported, improving privacy for all users.

Built by Zenrock

Hush is developed by Zenrock, the team behind zenBTC — a widely adopted Bitcoin asset on Solana secured by decentralized custody. Zenrock utilises distributed multi-party computation (dMPC), which enables cryptographic operations without ever assembling a private key in one place, removing single points of control and failure.

This architecture already secures zenBTC, which has processed thousands of BTC mints and redemptions, generated tens of millions in volume, and is actively used across Solana DeFi as productive collateral. Hush extends this same trust-minimised, battle-tested infrastructure to privacy.

Privacy, Evolved

As Solana expands into payments, trading, and institutional use, users need the ability to transact without exposing their entire financial history. At the same time, privacy must coexist with real-world requirements. Hush is designed for real-world use:

• Deposits are screened
• Sanctioned regions are restricted
• Users retain control over cryptographic records they can share with auditors if needed

Privacy and compliance are not opposites. Hush is built to support both.

To Get Involved

Use Hush

Shield assets and earn yield privately at app.zenrocklabs.io/services/hush/shield.

Build on Hush

Create private applications on Solana with privacy and yield built in by default. If you would like to build, reach out through @ad1_onchain or [email protected].

Partner with Zenrock

Integrate privacy into your product without sacrificing composability. Follow @Hushprotocol_ for updates and check out the docs at hushprotocol.xyz/docs.