Credential at the door
VisitorPass
Visitors present a credential issued by their employer or the venue; the host receives a signed, scoped attestation of identity, and no one learns more than they need to.
How it works
Identifiers, credentials, and proofs in one stack.
Decentralized identity (also called self-sovereign identity, or a reusable ID) gives a person full control over their own identity and data, without relying on a central authority. It starts with a decentralized identifier (DID): a globally unique identifier cryptographically bound to a key the holder controls.
A verifiable credential is a cryptographically signed statement an issuer makes about a holder: a passport authority asserting a nationality, a university a degree, an employer a role. The holder keeps it in a wallet and presents it to a verifier, who confirms the credential's integrity and authenticity by checking the issuer's and the wallet's signatures in the presentation, without ever contacting the original issuer. That offline check is what preserves the holder's privacy.
The credential carries two privacy options. Selective disclosure shares only the exact attributes a transaction needs. Zero-knowledge proofs go one step further: prove a property of a credential, over 18 or resident in the EU, without revealing the claim behind it. The verifier learns one bit, not the birthday.
Partisia ships the issuer side too: a credential-issuance service that authenticates the holder over OAuth2 and delivers the credential to their wallet over the OpenID for Verifiable Credential Issuance (OID4VCI) protocol, so any organisation can become a verified issuer.
Further reading