The pass is to include a “unique identifier,” but no explicit reference is made to biometrics or other methods of binding a person to a digital credential. The system is planned for roll-out before the summer, with few technical details included in an EC document on the plan, aside from the use of QR codes and W3C standards for decentralized identifiers (DIDs) and Verifiable Credentials. The main condition from the European Commission seems to be that member states must accept passes showing receipt of a vaccine approved in the region. The plan is for the EU to make the pass available to all people within the bloc, and member states to set their requirements and regulate their use.

The ‘digital green pass’ system proposed in Europe does not meet the EU’s requirements for protection against data breaches and discrimination, a Pirate Party Member of European Parliament says, and a lack of specificity in the proposal is giving room to concerns about its use of blockchain and potential function creep, according to TechCrunch.

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