Article 4 — Trust framework for the EU Digital COVID Certificate

1. The Commission and the Member States shall set up and maintain a trust framework for the EU Digital COVID Certificate.
2. The trust framework shall be based on a public key infrastructure and allow for the reliable and secure issuance and verification of the authenticity, validity and integrity of the certificates referred to in Article 3(1). The trust framework shall allow for the detection of fraud, in particular forgery. In addition, it may support the bilateral exchange of certificate revocation lists containing the unique certificate identifiers of revoked certificates. Such certificate revocation lists shall not contain any other personal data. The verification of the certificates referred to in Article 3(1) and, where applicable, certificate revocation lists shall not give rise to the issuer being notified of the verification.
3. The trust framework shall seek to ensure interoperability with technological systems established at international level.