How recent the evidence is, and how a verifier knows it was not replayed.
Evidence is only useful if it is fresh. Verifiers use nonces, timestamps or epoch markers to know the evidence was made now and for them.
Freshness is where re-attestation becomes a policy question: how old may evidence be before an action, a key release or a session renewal needs a new proof?
Example. A verifier sends a random number with its request. Evidence that does not contain that number was made for someone else, or earlier, and is refused.
Attested AIAttested wallets and digital identity
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Next fixed date: EU Digital Identity Wallets are due in every member state on 24 December 2026, 42 days from now.