How it works

From your phone to a yes-or-no answer

Five steps carry you from a tap on your phone to a yes-or-no answer anyone can check. At every step we show what each party sees and what it signs.

As you scroll, each step of the trust flow reveals in turn. The diagram stays pinned so you never lose your place.

Reduced motion is on, so nothing animates. Every step below is shown at once, each labelled in words with its number, the party, what it sees, and what it signs.

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  1. Step 1 of 5 — Your phone

    Mint a biometric-gated key

    Sees
    Your biometric and the new private key — the only place either one ever exists.
    Signs
    Mints a keypair inside the Secure Enclave / StrongBox, unlockable only by your biometric. Nothing leaves the device.

  2. Step 2 of 5 — Your phone

    Platform TEE attestation

    Sees
    The public key and the platform (Apple / Android) attestation for it.
    Signs
    The secure hardware attests that the key was minted in a genuine TEE. The private half never surfaces.

  3. Step 3 of 5 — Your phone

    Generate the zero-knowledge proof

    Sees
    The proof inputs, kept on the phone. Nothing secret leaves the device.
    Signs
    A P-256 zero-knowledge proof, generated on the phone. The biometric never leaves it.

  4. Step 4 of 5 — Verity server

    Validate attestation, relay the proof

    Sees
    The attestation, the public key, and the finished proof — never the biometric. Relay-only on the proof path.
    Signs
    Validates the attestation, signs an issuer attestation, and relays the phone-made proof onward. It never sees the biometric and cannot forge the proof.

  5. Step 5 of 5 — StarkNet

    The chain answers is_human(address)

    Sees
    The relayed proof and the issuer attestation.
    Signs
    Records the result so anyone can read is_human(address) on-chain.
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