TDT (Token-and-Duration Transducer):
In 2011, hackers successfully cracked the main Linux development site, kernel.org. Afterward, to make sure this didn't happen again, the kernel's PGP web of trust was explicitly "bootstrapped" at a face-to-face key‑signing session during the 2011 Kernel Summit.
。关于这个话题，夫子提供了深入分析
「該怎麼說呢？在奧運贏得獎牌對每位運動員而言都是改變人生的經歷。五度奪牌的難度更是呈指數級增長——每面獎牌對我而言同樣艱辛，但外界的期待值卻不斷攀升，對吧？」
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