How to Store Personal Documents and Driver's License on Your Phone?

The European Union is undergoing a fundamental shift in the field of personal identification. In 2026, the “European Digital Identity Wallet” (EUDI) transitioned from a theoretical project to a daily reality for millions of citizens. This is not just a digital copy of “Apple Wallet” or “Google Pay” – it is a high-security ecosystem designed to store not only payment cards but also identity cards, driver’s licenses, and diplomas.

In this article, we explore the technological architecture of EUDI, security protocols, and practical aspects of how this system is changing our relationship with privacy management.

1. What is the EU Digital Wallet (EUDI)?

The EUDI wallet is a digital application created under the eIDAS 2.0 regulation. Its main goal is to provide EU citizens with the ability to securely identify themselves both online and physically, without creating dozens of different accounts and without using physical plastic cards.

Key components:

• PID (Personal Identification Data): The main data set (name, surname, date of birth) issued by state authorities.
• QEAA (Qualified Electronic Attribute Attestation): Qualified electronic attributes such as driver’s licenses, professional licenses, or bank account statements.
• Selective Disclosure: The ability to provide only the data necessary for a specific operation (e.g., confirming adulthood without disclosing the exact date of birth).

2. Technological Architecture and Security

Security is the cornerstone of the EUDI wallet. Unlike traditional cloud services, this system is based on Self-Sovereign Identity (SSI) principles, giving users complete control over their data.

Hardware Security

Data on the phone is not stored in a simple app folder. They are housed in a Secure Element (SE) or Trusted Execution Environment (TEE) – an isolated part of the processor that is resistant even to a compromised operating system. This ensures that no malware can seize the identity key.

Zero-Knowledge Proofs (ZKP)

This is a cryptographic method that allows one party to prove to another that a statement is true without revealing any additional information.

Example: When purchasing alcohol or renting a car, the wallet generates a ZKP proof that the user is over 18 years old, but the seller never learns the user’s name or exact date of birth.

3. Driver’s License and Document Integration

In 2026, a driver’s license on the phone is a fully legal document throughout the EU. According to the ISO/IEC 18013-5 standard, the digital license works even without an internet connection.

How Does It Work in Practice?

• Roadside Check: A police officer scans your generated QR code or uses NFC (Near Field Communication) interface.
• Data Transfer: Only the data necessary to confirm the right to drive is transmitted.
• Cross-border Validity: A digital license issued in Lithuania is automatically recognized in France or Italy without any additional translations or notarizations.

4. Privacy Protection and Combatting Tracking

One of the biggest fears associated with digital wallets is state control. However, the eIDAS 2.0 architecture is designed so that the state cannot track where and when you use your wallet.

Anti-tracking Measures:

• No Central Database of Usage: There is no central database that records every instance of wallet usage (e.g., entering a nightclub or hotel check-in).
• User-centricity: Only the user initiates data sharing. The wallet cannot be scanned remotely without the user’s biometric confirmation (FaceID or fingerprint).

5. Academic Insights: Trust Ecosystem

Research (e.g., G. Zyskind et al., 2024) emphasizes that the success of digital identities depends on the stability of the “Trust Framework.” The success of the EUDI wallet in 2026 is based on Decentralized Identifiers (DIDs) technology, which eliminates the need to trust a single central authority for each transaction.

Digital Divide

Academic literature (e.g., K. Rannenberg, 2025) also discusses the “digital divide.” While the system is secure, challenges arise for individuals who do not use smartphones.

Ensuring Alternatives

Therefore, EU regulations in 2026 stipulate that physical cards must remain as an alternative, but the digital version becomes a priority for public services.

6. Practical Tips for Users

“Digital identity is not just a technical solution – it is a new standard of civil liberty in the digital age.”

– EUDI Implementation Guidelines

• Biometric Protection: Always use the strongest possible biometric lock. Avoid simple PIN codes.
• Backup Strategy: While a digital document is convenient, have a way to access your digital keys through another device if you lose your phone.
• Check Certificates: Use only the official wallet application issued by your country (in Lithuania – linked to the “Vartų” system).

Conclusions

The EU digital wallet in 2026 is much more than convenience – it is the foundation for digital freedom and privacy. By using ZKP, Secure Element, and SSI principles, it ensures that your personal documents on your phone are safer than in a physical wallet. This is a significant step towards a unified digital European market, where borders no longer exist even at the document level.

Sources and Literature:

• European Parliament (2024). Regulation (EU) 2024/1183 amending Regulation (EU) No 910/2014 as regards establishing a framework for a European Digital Identity (eIDAS 2.0). Official Journal of the EU.
• Zyskind, G., & Nathan, O. (2024). Decentralizing Privacy: Using Blockchain to Protect Personal Data. Journal of Cybersecurity and Privacy.
• ISO/IEC 18013-5:2021. Personal identification — ISO-compliant driving licence — Part 5: Mobile driving licence (mDL) application.
• Rannenberg, K. (2025). Privacy and Security in the EUDI Wallet Ecosystem: A Comprehensive Analysis. European Journal of Law and Technology.
• ENISA (European Union Agency for Cybersecurity) (2026). Security Standards and Implementation Guidelines for the EUDI Wallet.
• Dunphy, P., & Petitcolas, F. A. (2023). A Review of Self-Sovereign Identity Technologies and Their Application in Digital Wallets. IEEE Access.