arf-topic-a-privacy-risks-and-mitigations-part-2

To mitigate linkability and user profiling in an EUDI Wallet, integrate Zero-Knowledge Proofs and apply specific modifications to the Architecture and Reference Framework (ARF), including required updates to Annex 2.

Privacy requirements for EUDI Wallet attestations involve specific additions, deletions, and modifications to ARF Annex 2, focusing on integrating Zero-Knowledge Proofs and establishing strict data handling policies for providers and relying parties.

Zero-Knowledge Proofs prevent user profiling in EUDI Wallet ecosystems by allowing attestations to be verified without revealing unnecessary underlying data, thereby reducing linkability across relying parties and revocation list interactions.

Relying parties must adhere to modified ARF data handling policies that govern attestation management and revocation list interactions, ensuring strict limits on data retention and preventing cross-service user tracking.

Implementing the ARF privacy mitigations requires understanding Zero-Knowledge Proof integration, as the proposed modifications specifically depend on ZKP mechanisms to effectively eliminate linkability and protect user data.

Revocation lists pose linkability risks if handled improperly; the ARF mitigations address this by proposing specific data handling policies and ZKP integrations to prevent relying parties from correlating user activity through revocation checks.