ADIA - Accountable Digital Identity Association

The ADI Association is a non-profit industry consortium launched in 2019 (originally as DID Alliance) that develops the ADIA Specification - a framework for implementing privacy-preserving, accountable digital identity systems. The specification defines protocols and standards for creating verifiable digital identities that can be used across different services while maintaining user privacy and accountability.

The core technical components include:

• A Directory Protocol for managing unique Digital Addresses that serve as human-readable identifiers mapped to W3C DIDs
• Trust Anchors that cryptographically link identities across the ecosystem using DIDComm messaging
• Verifiable Credentials following the W3C VC Data Model for issuing and verifying identity claims
• FIDO Authentication integration for secure authentication
• A network of regional directories and interchange services for identity verification and credential exchange

The ADIA architecture enables interoperability between different identity providers and verifiers through standardized protocols, while keeping personal data under user control. Notable technical features include privacy-preserving lookups using hashed attributes, consent-based sharing of credentials, and support for both smartphone and non-smartphone authentication methods. The specification has been implemented by several major financial institutions and government agencies, particularly in South Korea where the DID Alliance Korea has driven adoption.

The framework aims to balance privacy and accountability by using Identity Escrow services that enable disclosure of identity information only under specific consented conditions. This allows for privacy-preserving identity verification while maintaining accountability for fraud prevention. The ADI Association continues to evolve the specification through working groups focused on technical standards, governance frameworks, and real-world implementations.