Selective disclosure
Selective disclosure is the ability to share only the specific attributes a verifier needs from a credential, for example proving you are over 18 without revealing your exact birth date.
It works because a credential format such as SD-JWT signs each claim separately, so a holder can leave any claim out of what they send while the remaining ones still check against the original signature. Selective disclosure is a core privacy requirement for the EUDI Wallet under eIDAS 2.0, which is designed to let citizens and businesses prove exactly what a relying party asks for and nothing more.