Passwords — we all have a million of them in our lives. Like them or not, you can't escape having to use them for just about everything these days, from unlocking your mobile phone to accessing your bank account online to streaming a movie on Netflix. While the prevalence of passwords has greatly increased thanks to computers and the Internet, they've actually been used, in one form or another, to protect things for hundreds, and even thousands, of years. Inspired by a recent Quora thread, here are a dozen of the most famous passwords used through (mostly recent) history, in both the real and fictional worlds.

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