I was asked a good question: What are these things? What are the
Imagine we’re using a basic signed credential like the one we’ve previously discussed. As in the constructions above, we’re going to ensure that the User picks a secret key K to embed within the signed credential.5 As before, the key K will powers a pseudorandom function (PRF) that can make pseudorandom “serial numbers” based on some input.
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It was 3% in the year to January 2026 - down from 3.4% in December.
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