Zero-Knowledge Identity
A zero-knowledge proof lets someone prove a statement is true without revealing the data behind it. In human.tech, that means a person can prove they are a verified, unique human, old enough, or cleared against sanctions lists, without handing over their name, date of birth, document number, or biometrics.
Why it matters
Conventional verification copies your documents to every service that checks them. Each copy is a breach risk and a tracking surface. Zero-knowledge identity inverts this: the sensitive data stays with the person, and a verifier receives only a cryptographic proof of the specific fact it needs.
How human.tech uses it
- Proof of personhood. Human Passport can prove a Unique Humanity Score meets a threshold without exposing the underlying stamps or accounts.
- Selective disclosure. Proofs can assert a single property, such as “over 18”, “not a sanctioned person”, or “citizen of an eligible country”, without revealing the exact value behind it.
- No PII on-chain. Personal data is never written to a blockchain in the clear. It is either cryptographically hashed or encrypted to a threshold network, so no single party holds it. See Cryptographic Security.
- Compliance without exposure. Proof of Clean Hands proves a person passed identity and sanctions checks while keeping their identity private.
In practice
A bank confirms a customer is verified and unsanctioned. A border checks a valid travel credential. A community confirms a participant is a unique human. In each case the verifier learns the answer to one question and nothing more.