Zcash has one of the strongest privacy models in crypto, but its privacy is locked inside its own chain.

This creates two major issues:

Usability

• ZEC can’t be used as collateral, can’t earn yield, and can’t interact with protocols while staying private.

Accessibility

• Users and developers outside the Zcash ecosystem have no practical way to access ZEC’s privacy features.
• Even if they want shielding, it’s not available on the chains where most activity happens.

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Our Vision

We want to make Zcash’s privacy accessible across the multichain world without compromising confidentiality.

ZEC should be usable on Ethereum, Solana, and other ecosystems while remaining fully shielded.

We achieve this by combining zero-knowledge proofs with fully homomorphic encryption (FHE) to create a trustless, privacy-preserving transfer tool.

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How It Works

Zcash side

Users burn shielded ZEC to a designated address.
Our watcher detects the burn but cannot see the sender or amount.
The destination address is optionally placed in the encrypted memo field.

Zero-knowledge proof

We generate a ZK proof that confirms:

• A valid burn happened
• It went to the correct burn address
• Amount and recipient match the commitments

All proven without revealing any values.

Destination chain

We mint FHZEC, a confidential wrapped token.
Balances remain encrypted through FHE, allowing transfers and DeFi usage while amounts stay hidden.

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The Result

• Zcash privacy extends beyond Zcash
• Balances remain confidential on transparent chains
• DeFi becomes possible without sacrificing privacy
• Smart contracts can operate on encrypted values

This isn’t just a tool, it’s privacy infrastructure bringing Zcash’s shielding model to the multichain ecosystem.

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How We Can Use mumtaZ’s Solution in the Future

mumtaZ opens the door to using shielded ZEC across multiple ecosystems without revealing any data.

Here are some of the ways mumtaZ’s solution can be used going forward:

• Use shielded ZEC as collateral, earn yield, borrow, or lend. All privately and across chains.
• Interact with protocols on Ethereum or Solana while keeping inputs, outputs, and states encrypted.
• Send encrypted value between networks without exposing amounts or addresses.
• Run automated strategies (e.g., rebalancing, yield optimization) without exposing portfolios.

here is the claim contract: https://sepolia.etherscan.io/address/0x9815aD7b9E6076ddA6D84A34864fF0c0F8E06744

here is the FHZEC contract: https://sepolia.etherscan.io/address/0xe97BcaFd6b75c1EF765912451d65a5c5f23A5Eb2