arf-topic-k-combined-presentation-of-attes

Combined presentation of attestations uses cryptographic binding to verify that multiple attributes presented together belong to the same user. This allows Relying Parties to securely process multi-attestation requests while preserving user privacy.

Cryptographic binding links attributes from different attestations, such as a PID and an EAA, to a single user identity. It enables Relying Parties to perform identity matching and verify data integrity across multiple presented attestations without identifying the user unnecessarily.

You verify attributes from different attestations belong to the same user by implementing identity matching mechanisms based on cryptographic binding. This confirms data integrity across multiple attestations presented in a combined transaction request.

Yes, combined presentation allows a Relying Party like a university to request proof of EU residency via a PID and academic credentials via an EAA simultaneously. Cryptographic binding ensures both attestations belong to the same applicant before proceeding with identification.

No, combined presentation of attestations is designed to be privacy-preserving. It allows Relying Parties to verify data integrity and user identity matching through cryptographic binding without forcing unnecessary or full user identification for each attribute shared.