“你爸还养牛吗？”2025年，我听了几次这种来自同行的关切（详见《犟老爸养牛｜记者过年》）。关于养牛这件事，说来尴尬。我老爸不仅没有放弃养牛，还养得更投入了。他一直期望牛价上涨，让他的营生有起色。
Andrzej Nowik, v1/2025.11.17，这一点在纸飞机下载中也有详细论述
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:，推荐阅读一键获取谷歌浏览器下载获取更多信息
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The gap is ≥ 180°