Identity standards, side by side.
OIDC · OID4VC · OID4VP · DIF Presentation Exchange · FROST. Pick a standard, see the receipt it produces, hover any field for the RFC it cites.
Authentication & ID tokens
OpenID Connect Core 1.0 as the substrate for authentication. Discovery, dynamic client registration, ID token issuance with acr/amr mapped to ISO 29115 levels of assurance.
Anatomy — operational specs
Presentation of verifiable credentials
OID4VP draft-21 carries the lender's presentation request and the wallet's vp_token response. Request objects are signed JWTs; responses are SD-JWT VPs with a key_binding_jwt.
Anatomy — operational specs
Issuance of verifiable credentials
OID4VCI draft-13 lets a credential issuer mint VCs to a holder wallet, with credential_offer + pre-authorized_code flow, batch issuance, and proof of possession over an ephemeral key.
Anatomy — operational specs
Threshold signatures
FROST (draft-irtf-cfrg-frost-15) runs a 2-of-3 over Ed25519 between Sarah, the bank, and the title company. Two round trips for commitments and partials; output is a single 64-byte signature.
Anatomy — operational specs
Presentation Exchange definitions
DIF Presentation Exchange v2 expresses what the verifier wants in JSONPath constraints. One input_descriptor per credential type; submission requirements compose multiple definitions.
Anatomy — operational specs
TrustOS, in one line
identity, made inspectable.
Click anything. The same primitives that compose the rest of the Transaction Science family — receipts, joules, signed transport — show up here too. The family is one system.