Wait until `condition(current_value)` is true, then return the
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We won’t worry too much about how blind signatures are actually constructed, at least not for this post. Let’s just imagine we’ve been handed a working blind signature scheme. Using this as an ingredient, it’s quite simple to build a one-time use anonymous credential, as follows:
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network round-trip time so it is performed，更多细节参见下载安装 谷歌浏览器 开启极速安全的 上网之旅。
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