Learn Confidential Tokens
A step-by-step walkthrough of Zama's FHE-powered confidential token ecosystem. From test tokens to encrypted balances — in 5 minutes.
What is FHE?
Fully Homomorphic Encryption
Fully Homomorphic Encryption (FHE)allows computations on encrypted data — without ever decrypting it. Zama's protocol brings this to Ethereum: your token balances and transfers are encrypted on-chain so that nobody, not even validators or block explorers, can see your holdings.
On-Chain Privacy
Balances are stored as ciphertexts in the smart contract state. No one can read them by inspecting the blockchain.
Compute on Encrypted Data
FHE lets the protocol process transfers, approvals, and balance checks — all while the data stays encrypted.
Owner-Only Decryption
Only you can decrypt your balance by signing an EIP-712 permit with your wallet. Your private key never leaves the browser.
Key Terms
ERC-7984The confidential token standard. Extends ERC-20 with FHE-encrypted balances and transfer amounts.fhEVMZama's modified EVM that supports fully homomorphic encryption operations natively in smart contracts.euint64An encrypted 64-bit unsigned integer — the native FHE type used for confidential token balances.Zama GatewayThe off-chain service that performs FHE decryption when a user provides a valid EIP-712 permit signature.