Vancouver, British Columbia, Amicus International Consulting publishes an in-depth briefing on the European Union Digital Identity Wallet, widely known as the EUDI Wallet, with a focus on cross-border login, data minimization, certification rules, and rollout status across Member States.
The wallet is central to the EU’s effort to harmonize digital identity, creating a tool that empowers citizens and businesses to prove identity, share only necessary data, and log in to services across borders with confidence.
What the EUDI Wallet Is, and Why It Matters for Cross-Border Login
The EUDI Wallet is a personal digital wallet that enables users to verify their identity, store and share digital credentials, and apply legally valid electronic signatures. Unlike earlier eID systems, the wallet is designed to be interoperable across all EU Member States.
This means that a citizen of one country can use their wallet app to access public or private services in another country without creating new accounts or sharing personal information unnecessarily.
The wallet is part of the updated European Digital Identity framework, often referred to as eIDAS 2. This framework extends the earlier eIDAS recognition model into a mobile-first design anchored by standard technical specifications.
Each Member State must provide at least one wallet that meets these standards, ensuring uniformity across borders. The common playbook is captured in the Architecture and Reference Framework, which defines how wallets, trust service providers, and relying parties interoperate.
The Legal Framework and Current Rules
The European Commission has adopted multiple rounds of implementing regulations since late 2024, moving the wallet project from proposal to enforceable law. These regulations outline the process for certifying wallets, registering relying parties, and handling breaches. They also establish official lists of certified wallets, allowing citizens and organizations to verify which apps are legitimate.
Rollout timelines are tied to these implementing acts. Member States are expected to make wallets available within two years of the finalization of the technical specifications. As of 2025, several states are already piloting wallets, with broader availability expected by 2026–2027.
Architecture and Reference Framework
The Architecture and Reference Framework, or ARF, functions as the EU’s technical playbook. It defines the protocols for issuing, presenting, and verifying credentials. It also includes privacy-enhancing mechanisms such as selective disclosure and zero-knowledge proofs.
The ARF includes the Person Identification Data Rulebook, which specifies how core identity attributes are encoded and cryptographically bound to a wallet. This ensures that when a person logs in with their purse, a relying party in another country can trust the identity presented without confusion or duplication.
Data Minimization by Design
One of the wallet’s innovative features is data minimization. Instead of handing over a full identity card, users can opt to share only the information necessary for a specific service.
For example, a person buying age-restricted goods can prove they are over 18 without disclosing their exact date of birth. A traveler booking a local train ticket can prove residency in the correct zone without handing over their full address.
The wallet achieves this through selective disclosure and zero-knowledge proofs. Selective disclosure allows portions of credentials to be revealed, while zero-knowledge proofs will enable a person to prove something is true without exposing the underlying data.
Credentials Inside the Wallet
The wallet can carry different credential types.
- Person Identification Data (PID): The core identity credential issued by a Member State.
- Electronic Attestations of Attributes (EAAs): Proofs of attributes such as residency, student status, or qualifications.
- Qualified Electronic Attestations of Attributes (QEAAs): High-assurance proofs issued by qualified trust service providers, used for regulated activities.
Wallets also support qualified electronic signatures and seals, which allow individuals and businesses to sign contracts and official documents across borders with full legal recognition.
How Cross-Border Login Works
A citizen uses their national wallet to log into a service in another country. The wallet presents PID and any additional attributes the user consents to share. The relying party validates the data against trust lists and certification records.
Users see which organization is requesting which data and why. This transparency is required by implementing acts and builds confidence in the system. Notably, the wallet remains voluntary. Citizens may still use existing identification methods, ensuring choice and inclusivity.
Large-Scale Pilots
The Commission launched pilots in 2023 to test the wallet across real-world scenarios. These pilots involve nearly all Member States and cover cases such as mobile driving licenses, eHealth, banking, education credentials, and professional mobility.
The pilots confirm that the wallet can reduce administrative delays, cut fraud risks, and support everyday life across borders. They also highlight where user education and infrastructure improvements are needed.
Sector Impacts
Government Services
Cross-border login simplifies relocation within the EU. Citizens can enroll with local authorities, register vehicles, and access tax systems using their wallet without creating duplicate accounts.
Healthcare
The wallet enables presentation of prescriptions and health credentials while sharing only necessary details. A traveler needing medicine abroad can authenticate and present a verified prescription without having to hand over their complete medical records.
Education
Universities can verify diplomas and student status through attestations. Exchange programs and Erasmus students will no longer need to mail notarized documents.
Banking
Wallet login supports strong customer authentication and streamlined onboarding. Banks can verify only the necessary attributes, reducing compliance burdens while protecting privacy.
Case Study 1: University Enrollment
A Spanish student accepted into a Dutch university logs in with her wallet. She consents to share PID and a verified education credential, but not her home address. The university accepts the credentials immediately, eliminating delays caused by manual verification of scanned documents.
Case Study 2: Small Manufacturer
A Slovenian family business must register with the Italian tax authorities. Using the EUDI Wallet, the owner authenticates cross-border transactions, presents a director’s attestation, and signs documents electronically. Registration completes in hours rather than days.
Case Study 3: Health Traveler
A Finnish traveler in Greece authenticates at a pharmacy using his wallet. He shares only the prescription code and necessary attributes. His inhaler is dispensed without exposing unrelated health data.
Case Study 4: Civil Engineer Mobility
A Polish engineer moving to Denmark uses the wallet to present a professional qualification from the QEAA. The Danish authority verifies it instantly and grants a license, bypassing the need for notarized copies.
Case Study 5: Train Kiosk Age Check
A German train kiosk requests proof of age. The traveler’s wallet provides a zero-knowledge proof that he is over 18, without revealing his date of birth.
Case Study 6: Remote Hiring
A Belgian technician hired by a French hospital uses the wallet to share PID, a professional license, QEAA, and proof of address. The hospital receives only what it needs to process payroll and credentials, without extra data.
Certification and Registration
Wallets must be certified against strict criteria for functionality, security, and privacy. Relying parties must register when requesting sensitive attributes. The wallet shows users the relying party’s registration details, ensuring transparency.
If breaches occur, certification rules require rapid notification and mitigation. This governance structure raises trust across borders.
Offline and Online Modes
The wallet supports both online and offline verification. This ensures usability in rural areas, border crossings, and transport hubs where connectivity is unreliable. Offline verification relies on cached trust material and updates when connectivity returns.
Case Study 7: Startup Marketplace
A Portuguese marketplace integrates wallet login. It requests only PID, a residency attestation, and a professional registration for contractors. Privacy complaints drop, onboarding accelerates, and new customers from Spain and France join seamlessly.
Case Study 8: University Hospital Research
A Belgian hospital recruits participants from Germany and Luxembourg for a clinical study. It requests only a proof of identity, proof of age, and health insurance attestations. The study avoids storing excess data and passes audits with stronger privacy credentials.
Risks and Controls
Organizations must prepare for relying party registration, consent transparency, and strong verifier infrastructure. Citizens must use only official wallet apps and carefully review consent screens.
Wallet use remains voluntary, ensuring inclusivity. Citizens can still access services via existing identification systems if they choose not to adopt the wallet.
Looking Ahead
The EUDI Wallet is a cornerstone of Europe’s digital identity strategy. It promises smoother cross-border mobility, greater privacy through data minimization, and a common foundation for both public services and private commerce.
The following milestones include expanding certified wallets, registering relying parties, and scaling use cases from pilots into complete national services. Within the next two years, EU residents can expect to see wallet use in sectors such as education, banking, travel, and healthcare become routine.
Amicus International Consulting Perspective
Amicus International Consulting views the EUDI Wallet as a model for privacy-protective identity management. The emphasis on data minimization, interoperability, and voluntary adoption ensures that citizens retain control while benefiting from streamlined access to services.
Our guidance to governments is to prioritize use cases where cross-border login delivers immediate benefits, such as student mobility, healthcare, and worker relocation. For businesses, we recommend adopting wallet login early to reach customers across Europe with reduced compliance burdens. For individuals, the wallet offers a safer, more straightforward, and more private way to engage online across borders.
Contact Information
Phone: +1 (604) 200-5402
Email: info@amicusint.ca
Website: www.amicusint.ca
