Governments ensure EUDI Wallet security through a layered framework established by eIDAS 2.0, combining mandatory certification, strict technical requirements, independent oversight, and ongoing monitoring. Every wallet solution must meet these standards before it can be issued to citizens or businesses, and compliance does not stop at launch. This article walks through each layer of that security framework, from the foundational rules to the people responsible for enforcing them.

What security framework does eIDAS 2.0 establish for the EUDI Wallet?

eIDAS 2.0 establishes a comprehensive, legally binding security framework that every European Digital Identity Wallet must comply with before it can be made available to users. The regulation defines requirements covering cryptographic integrity, data minimisation, user control, and cross-border interoperability, all underpinned by a set of implementing regulations adopted by the European Commission.

At the heart of this framework is the Architecture and Reference Framework (ARF), a technical specification that describes how wallets must be built, how they communicate with other systems, and what security properties they must demonstrate. The ARF is not a suggestion. It is the authoritative blueprint that wallet providers, whether governments or private companies, must follow.

The framework also reflects a clear principle: users must remain in control of their own data. The EUDI Wallet is designed so that people can choose exactly what information they share, with whom, and when. Nothing beyond what is strictly necessary for a given interaction should be disclosed. This data minimisation principle is not just a privacy feature. It is a core security requirement built into the architecture itself.

Several implementing regulations sit beneath eIDAS 2.0, covering specific areas such as the certification of wallet solutions, protocols and interfaces, cross-border identity matching, and the handling of security breaches. Together, these create a detailed and enforceable rulebook that leaves little room for ambiguity.

How is the EUDI Wallet certified before it can be used?

Before an EUDI Wallet solution can be deployed to the public, it must go through a formal certification process. This process verifies that the wallet meets all technical and security requirements defined in eIDAS 2.0 and the ARF. Certification is carried out by accredited conformity assessment bodies, independent organisations authorised to evaluate whether a wallet solution genuinely meets the required standards.

The certification process examines several dimensions of a wallet solution, including:

• Cryptographic security and key management
• Integrity and core functionality as defined in the implementing regulations
• Secure storage of identity data and credentials
• Compliance with protocols and interfaces for interoperability
• Resilience against known attack vectors and vulnerabilities

Once a wallet solution passes certification, it is added to an official list of certified European Digital Identity Wallets maintained at the EU level. This list gives relying parties, such as banks, healthcare providers, and public services, confidence that they are interacting with a verified and trustworthy wallet. Certification is not a one-time event. Wallets must maintain compliance as the technical standards evolve, and recertification may be required when significant updates are made.

The large-scale pilots launched in 2023, involving more than 350 entities across 26 Member States plus Norway, Iceland, and Ukraine, played an important role in shaping what certification looks like in practice. The insights gathered from those pilots directly informed the security and interoperability requirements that wallet providers must now meet.

What technical security requirements must EUDI Wallet providers meet?

EUDI Wallet providers must meet a detailed set of technical security requirements that cover everything from how identity data is stored to how credentials are presented and verified. These requirements apply equally to government-issued wallets and privately operated wallets that have been officially recognised under eIDAS 2.0.

Key technical requirements include:

1. Cryptographic proof: All identity data and credentials stored in the wallet must be cryptographically signed, making it possible for any verifier to confirm their authenticity without contacting the original issuer.
2. Secure key storage: Private keys used to sign and authenticate must be stored in a secure environment, typically a hardware-backed secure element, to prevent extraction or misuse.
3. Selective disclosure: Wallets must support selective disclosure, meaning users can share only specific attributes from a credential rather than the full document. For example, proving age without revealing a date of birth.
4. Binding to the holder: Credentials must be cryptographically bound to the wallet holder, preventing credentials from being copied and used by someone else.
5. Interoperability standards: Wallets must implement the protocols and interfaces defined in the implementing regulations, ensuring they work seamlessly with relying parties and other wallets across EU Member States.
6. Breach response: Providers must have documented procedures for detecting, reporting, and responding to security breaches, in line with the implementing regulation on security incidents.

These requirements reflect a broader shift in digital identity thinking, moving away from centralised databases and toward cryptographic proof that travels with the user. For organisations in regulated sectors such as finance, healthcare, and government, understanding these technical foundations is essential for building systems that can accept and verify wallet credentials reliably. TrustTech’s digital identity solutions are built around exactly these standards, helping organisations integrate wallet-ready verification into their existing processes.

Who oversees and enforces EUDI Wallet security across EU member states?

Oversight of EUDI Wallet security is shared between national supervisory bodies in each Member State and the European Commission at the EU level. Each country is responsible for supervising the wallet solutions issued or recognised within its borders, while the Commission coordinates consistency across the single market and maintains key registers such as the list of certified wallets.

National supervisory bodies have the authority to investigate wallet providers, require corrective action, and suspend or revoke certification if a wallet solution is found to be non-compliant. The implementing regulations define the formats and procedures for annual reports that these supervisory bodies must submit, creating a structured accountability mechanism that operates on a recurring basis.

Peer reviews between Member States add another layer of scrutiny. Under the implementing regulation on peer reviews of eID schemes, countries assess each other’s approaches, sharing findings and identifying gaps. This cross-border review process helps raise standards consistently rather than allowing divergence to creep back in, which was one of the key weaknesses of the original eIDAS regulation.

For organisations operating across multiple EU countries, this shared oversight model has a practical implication: a wallet certified and supervised in one Member State must be recognised in all others. This mutual recognition principle is central to the EUDI Wallet’s value proposition, and the oversight framework is what makes that recognition trustworthy. Organisations in the government sector in particular need to understand how these supervisory relationships work when planning their wallet integration strategies.

How does ongoing monitoring keep the EUDI Wallet secure after launch?

Ongoing monitoring of EUDI Wallet security happens through a combination of mandatory reporting, incident response obligations, and continuous technical updates to the ARF. Security does not end at certification. Wallet providers are required to monitor their systems actively and report any significant security breaches to the relevant supervisory body in a timely manner.

The implementing regulation on security breaches of European Digital Identity Wallets sets out specific obligations for how incidents must be detected, classified, and reported. This creates a clear chain of accountability: if something goes wrong, there is a defined process for escalation and response that protects users and the broader ecosystem.

At the technical level, the ARF is a living document. As new threats emerge and as the large-scale pilots generate real-world insights, the reference framework is updated to reflect current best practices. Wallet providers must track these updates and adapt their implementations accordingly, which is why the certification process includes provisions for ongoing compliance rather than treating initial approval as permanent.

The pilots that ran until 2025 were instrumental in stress-testing these monitoring mechanisms. Feedback collected across the 11 use cases, ranging from opening a bank account to claiming prescriptions and accessing social security benefits, revealed practical vulnerabilities and usability challenges that have since been addressed in updated specifications. This iterative approach to security is one of the reasons the EUDI Wallet framework is considered more robust than earlier EU digital identity initiatives.

How TrustTech helps organisations prepare for EUDI Wallet security requirements

Meeting EUDI Wallet security standards is not just a technical challenge. It requires aligning your processes, systems, and compliance frameworks with a regulatory landscape that is still evolving. Many organisations, particularly in finance, healthcare, and government, are still working out what these requirements mean for their day-to-day operations.

TrustTech supports organisations through every stage of that journey. Concretely, this means:

• Assessing your current digital identity infrastructure against eIDAS 2.0 and ARF requirements
• Implementing wallet-ready onboarding and verification flows that meet certification standards
• Enabling reusable, cryptographically verified credentials that reduce friction for users and the compliance burden for your organisation
• Building interoperable trust infrastructure that works across borders and sectors
• Supporting your team with practical guidance on regulatory requirements, from data minimisation to breach response obligations

Whether you are a financial institution preparing for wallet-based KYC, a healthcare provider looking to accept digital prescriptions, or a government body deploying public services through the EUDI Wallet, TrustTech brings the technical depth and regulatory expertise to help you move forward with confidence. Explore our implementation approach or get in touch with our team to discuss what EUDI Wallet readiness looks like for your organisation.