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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.
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2025年12月，一场以“习近平法治思想引领新时代审判工作高质量发展”为主题的党组理论学习中心组学习会在上海高院举行。聚焦习近平总书记对全面依法治国工作作出的重要指示，中心组成员展开深入学习。
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