We can modify our ZK credential to support a limit of N shows as follows. First, let’s have the User select a random key K for a pseudorandom function (PRF), which takes a key and an arbitrary input and outputs a random-looking outputs. We’ll embed this key K into the signed credential. (It’s important that the Issuer does not learn K, so this often requires that the credential be signed using a blind, or partially-blind, signing protocol.3) We’ll now use this key and PRF to generate unique serial numbers, each time we “show” the credential.
Обвиняемый в хищении миллиардов рублей у Минобороны России сделал признание08:42
，这一点在搜狗输入法2026中也有详细论述
Индия запланировала купить у России пять дивизионов С-40002:00
Лина Пивоварова (редактор отдела Мир)
Ergonomic keyboards