---
id: concepts-overview
title: EUDI Wallet Insights
description: Technical deep dives, business guides, and specifications for building on the European Digital Identity Wallet ecosystem.
hide_title: true
sidebar_label: EUDI Wallet Insights
keywords: [EUDI Wallet, European Business Wallet, OpenID4VC, OpenID4VCI, OpenID4VP, DCQL, credential formats, eIDAS 2.0, data agreements, data disclosure agreements, data intermediation service]
slug: /
---

> **Build this with an AI coding agent.** Install the iGrant.io Agent Skills, then ask your agent to build the integration:
>
> ```bash
> npx skills add L3-iGrant/skills
> ```


import { LandingCardGrid, LandingCard } from '@site/src/components/LandingCardGrid';

# EUDI Wallet Insights

Whether you're integrating the EUDI Wallet, designing systems around it, or evaluating its business case, this section is the technical reference. Published by iGrant.io in collaboration with EU Digital Identity Wallet Consortium (EWC) partners.

## Protocol Deep Dives

<LandingCardGrid columns={2}>
  <LandingCard
    title="EUDI Wallets with OpenID4VC"
    description="How OpenID4VCI and OpenID4VP work together to issue and present verifiable credentials in the EUDI Wallet ecosystem."
    to="/concepts/openID4vc/"
  />
  <LandingCard
    title="DCQL in the EUDI Wallets"
    description="Granular, multi-credential queries for OpenID4VP presentation requests, illustrated with payment-flow examples from the European Business Wallet."
    to="/concepts/eudi-wallet-dcql-openid4vp-business-wallet-payments/"
  />
  <LandingCard
    title="Credential Formats in EUDI Wallets"
    description="A comparison of W3C VC, IETF SD-JWT, and ISO 18013-5 mDoc/mDL formats and when to choose each."
    to="/concepts/eudi-wallet-verifiable-credential-formats/"
  />
  <LandingCard
    title="Credential Issuance Lifecycle (OpenID4VCI)"
    description="Six progressive stages from offer-sent to credential-accepted, with state diagrams and webhook events."
    to="/concepts/credential-issuance-lifecycle/"
  />
  <LandingCard
    title="Wallet Unit Attestation (WUA)"
    description="How the EUDI Wallet proves it is genuine and its keys are protected, via the Wallet Instance Attestation and Key Attestation, during OpenID4VCI issuance and under the TS3 profile."
    to="/concepts/wallet-unit-attestation/"
  />
  <LandingCard
    title="WSCA and WSCD"
    description="The Wallet Secure Cryptographic Device and Application: the certified hardware and secure app where the EUDI Wallet's keys are generated and protected, and how they underpin the Key Attestation in the WUA."
    to="/concepts/wallet-secure-cryptographic-application-device/"
  />
</LandingCardGrid>

## Business Guides

<LandingCardGrid columns={2}>
  <LandingCard
    title="What are EUDI Wallets?"
    description="What EU Digital Identity (EUDI) Wallets are: why they exist under eIDAS 2.0, what they can do and hold, who is involved, and when they arrive."
    to="/concepts/what-is-the-eu-digital-identity-wallet/"
  />
  <LandingCard
    title="The EUDI Wallet (eIDAS 2.0): A Business Guide to Use Cases"
    description="Sector-by-sector business benefits and use cases for the European Digital Identity Wallet under eIDAS 2.0."
    to="/concepts/eu-digital-identity-eudi-wallet-business-benefits-use-cases-eidas/"
  />
  <LandingCard
    title="Introduction to eIDAS 2.0 and Digital Wallets"
    description="The regulatory foundation of the European Digital Identity Wallet and how it differs from eIDAS 1.0."
    to="/concepts/eidas2-and-digital-wallets/"
  />
  <LandingCard
    title="European Business Wallets"
    description="How the Business Wallet enables trust and scale across regulated organisations within the EUDI Wallet ecosystem."
    to="/concepts/european-business-wallets/"
  />
</LandingCardGrid>

## Specifications

<LandingCardGrid columns={2}>
  <LandingCard
    title="Data Agreements (DA)"
    description="The conceptual model for data agreements in the digital identity ecosystem."
    to="/concepts/data-agreements/"
  />
  <LandingCard
    title="DA Vocabulary versions"
    description="Version history of the Data Agreement vocabulary."
    to="/concepts/data-agreements-versions"
  />
  <LandingCard
    title="Data Disclosure Agreements (DDA)"
    description="Specification for selective disclosure of data attributes between organisations."
    to="/concepts/data-disclosure-agreements/"
  />
  <LandingCard
    title="DDA Vocabulary versions"
    description="Version history of the Data Disclosure Agreement vocabulary."
    to="/concepts/data-disclosure-agreements-versions"
  />
  <LandingCard
    title="Data Intermediation Service Provider (DISP)"
    description="The role of intermediation services under the EU Data Governance Act."
    to="/concepts/disp-overview/"
  />
  <LandingCard
    title="Reference Model"
    description="The Minimum Disclosure Option (MDO) reference model for selective data sharing."
    to="/concepts/mdoDocs/mdo-ref-model"
  />
  <LandingCard
    title="Data Exchange Landscape"
    description="An overview of the European data exchange landscape and how the specifications fit together."
    to="/concepts/data-exchange-landscape"
  />
</LandingCardGrid>

## Research

<LandingCardGrid columns={2}>
  <LandingCard
    title="Data Exchange Agreements Framework (IEEE Paper)"
    description="Peer-reviewed IEEE paper on the conceptual framework for data exchange agreements."
    to="/concepts/dataexchange-agreements-ieee-paper/"
  />
</LandingCardGrid>