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The power of the ZK approach gives us many other tools to limit the power of credentials. For example, it’s relatively easy to add expiration dates to credentials, which will implicitly limit their useful lifespan — and hopefully reduce the probability that one gets stolen. To do this, we simply add a new field (e.g., Expiration_Time) that specifies a timestamp at which the credential should expire.
南方人物周刊：你写了很多关于父亲的故事，还有父亲离世之后你写给他的信。你跟父亲的关系怎么样？你们会经常聊天吗？