本文尝试一步步还原HTTPS的设计过程，以理解为什么HTTPS最终会是这副模样。但是这并不代表HTTPS的真实设计过程。在阅读本文时，你可以尝试放下已有的对HTTPS的理解，这样更利于“还原”过程。
转自公众号“ 程序员的那些事“ 如有侵权请告之。
也许这样理解 HTTPS 更容易
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