OOBI (Out-of-Band Introduction) Protocol

Protocolo de Identidad

A formal protocol specification (IETF Internet-Draft) defining a mechanism for introducing KERI Autonomic Identifiers (AIDs) to witness, watcher, and service endpoints via URL-based out-of-band exchanges. An OOBI is a URL pairing an AID with a network endpoint (IP address or URL) that can provide or cache the associated KERI Key Event Log (KEL). OOBIs enable KERI participants to bootstrap identifier discovery without a centralized directory, allowing any party with the OOBI URL to locate and verify another party's key state.

Comunidad

Enlaces

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Detalles

Licencia

Open specification (IETF I-D); reference implementations in KERI Python (keripy) and Rust (keri-core) under Apache-2.0

Estado de Desarrollo 🟢 Activo

Detalle del Estado de Desarrollo

Released (implemented in production KERI tooling including KERIA, keripy, and the WebOfTrust reference implementations; IETF Internet-Draft active)

Propietario

Samuel M. Smith (spec author); IETF Internet-Draft (draft-ssmith-oobi); KERI community

Órgano de Gobierno IETF (Internet-Draft draft-ssmith-oobi) | None (single specification author; KERI community)

Órgano de Gobierno - Lista

Internet Engineering Task Force

País

USA (Samuel M. Smith)

Año de Inicio 2021

Stack

Language-agnostic (IETF specification); implemented in Python (keripy / KERIA), TypeScript (signify-ts), Rust; HTTP URLs as the OOBI format

Financiamiento

Community / DARPA (KERI ecosystem funded partly by DARPA and DIF grants; OOBI spec funded as part of KERI development)

Financiamiento - Lista

Decentralized Identity Foundation

Última Investigación 1 jul 2026

Vista de topología

Esta herramienta en el centro y lo que se relaciona directamente con ella. Cada línea nombra el tipo de relación.

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Dominios de Caso de Uso

Identidad y Confianza

Capacidades

Portabilidad del grafo de confianza

Identidad soberana

Protocolo de Identidad Atributos

Orígenes

KERI ecosystem bootstrap (designed to solve KERI's identifier discovery problem — KERI AIDs are self-certifying but need a mechanism for parties to locate each other's key event logs without a central directory)

Base de Datos

N/A (OOBIs point to endpoints that serve KELs; no database defined by the OOBI spec itself)

Lenguaje de Consulta

HTTP URL resolution (OOBI is a URL; resolution fetches KEL from specified endpoint via HTTP GET)

Formatos de Datos

OOBI URL (format: scheme://host:port/oobi/{AID}/{role}/{eid}); KERI CESR (Composable Event Streaming Representation) for KEL data returned by endpoints

Soporte Móvil

Library-level (any HTTP client; QR code OOBI sharing common in mobile KERI wallet implementations)

Soporte Web

Yes (OOBI URLs are HTTP/HTTPS; web-based KERI wallets resolve OOBIs via standard HTTP)

Aplicaciones Nativas

Library-level (embedded in KERI wallet applications; QR code OOBI sharing in mobile wallet UIs)

Términos

Free / Open standard (IETF Internet-Draft; Apache-2.0 reference implementations)

Financiamiento - Lista

Decentralized Identity Foundation

Fondos

Unknown (part of broader KERI ecosystem funding; not separately itemized)

Basado En

KERI (Key Event Receipt Infrastructure) — OOBI is the bootstrap/discovery mechanism for KERI identifiers; HTTP URL format; CESR (Composable Event Streaming Representation) for KEL data

Órgano de Gobierno - Lista

Internet Engineering Task Force

Permisos

Key-based (OOBI is an open URL; AID key control governs what can be done with the discovered identity)

Autenticación e Identidad

KERI AID-based (OOBI introduces a KERI AID to its endpoint; authentication is via KERI key event log verification, not OOBI itself)

Modelo de Almacenamiento

N/A (OOBI points to endpoints; storage is at the KERI witness/watcher infrastructure level)

Interoperabilidad

KERI ecosystem (OOBI is specific to KERI AID discovery; compatible with any KERI-conformant implementation)

Portabilidad de Datos

Full portability (OOBIs can be exchanged out-of-band via any channel — QR code, email, chat, NFC — enabling key state discovery independently of platform)

Gobernanza y Toma de Decisiones

Community / IETF process (IETF Internet-Draft; community-governed; Sam Smith as spec author)

Madurez del Protocolo / Estandarización

IETF Draft (active IETF Internet-Draft draft-ssmith-oobi; implemented in production KERI tooling; not yet published as RFC)

Estándares de Identidad

KERI (Key Event Receipt Infrastructure); W3C DID (KERI AIDs can be expressed as DIDs); CESR (Composable Event Streaming Representation)

Estándares de Identidad - Lista

Métodos DID Soportados

did:keri (KERI AIDs as DIDs; OOBI is the discovery mechanism for did:keri resolution)

Métodos DID Soportados - Lista

Gestión de Claves

Delegated to KERI (OOBI locates the key event log; KERI manages key rotation, pre-rotation, and recovery via the KEL)

Tipos de Credenciales

N/A (OOBI is a discovery/bootstrap protocol; credential types defined at KERI/ACDC layer)

Tipos de Credenciales - Lista

Método de Verificación

Key event log verification (OOBI URL leads to KEL; cryptographic verification of key binding performed by KERI resolver, not OOBI itself)

Funciones de Privacidad

Minimal (OOBI URLs may expose AID and endpoint; out-of-band exchange (QR code, direct link) limits exposure; no ZKP features)

Métodos de Autenticación

QR code scanning (common OOBI exchange mechanism in wallets); Deep linking (OOBI URL passed via any channel); HTTP GET resolution

Mecanismo de Revocación

N/A (OOBI is a discovery URL; revocation handled at KERI key event log level)

Tipos de Agentes Soportados

Any KERI-identified entity: Humans (individuals), Organizations, Services/APIs, Devices/IoT

Tipos de Billetera/Cliente

SDK/Library integration (keripy, signify-ts, KERIA server); QR code exchange in mobile wallets

Mecanismos de Recuperación

N/A (recovery handled at KERI level via key event history and pre-rotation)

Cumplimiento / Regulaciones

Unknown (IETF Internet-Draft; no specific regulatory compliance addressed)

Protocolos de Intercambio de Credenciales

KERI/ACDC (Authentic Chained Data Containers); compatible with DIDComm via KERI DID method

Protocolos de Intercambio de Credenciales - Lista

Marco de Confianza

Cryptographic verification only (OOBI points to KEL; trust established through KERI key event log cryptographic verification; no external trust anchor)

Modelo de Costos

Free (open IETF Internet-Draft; open source implementations)

Resistencia a la Censura

Hybrid (OOBI URLs depend on endpoint availability; multiple OOBIs can be provided for same AID via different witnesses/watchers; resilient via multi-witness architecture)

Relaciones

Cómo se conecta esta herramienta con otras herramientas y organizaciones, según relaciones revisadas por el responsable de datos de OpenHaven. Describen cómo se conectan los proyectos, no su calidad.

Administrado por: Internet Engineering Task Force
Basado en: ACDC (Authentic Chained Data Containers)
KERI
Cumple con: DIDs
KERI
Estandarizado en: Internet Engineering Task Force
Financiado por: Decentralized Identity Foundation
Habla el protocolo: ACDC (Authentic Chained Data Containers)
DIDComm
KERI
Miembro de la suite: KERI Suite
Se identifica mediante: DIDs
KERI
Interopera con: KERI
Base de: ACDC (Authentic Chained Data Containers)
KERI
Protocolo hablado por: ACDC (Authentic Chained Data Containers)
Requerido por: did:scid