this post was submitted on 07 Jun 2024
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That's the copy protection on dozens of computer games from the 90s.
To get my codes you have to play Alone in the Dark 2, and have the original 2 sided playing cards, then translate that into Brittanic runes and find the latitude and longitude of the given city on a cloth map from the original Ulitma.
Well, I am a Gen-X'r.
Chuck Yeager's air combat!
It's also even older in use in communicating secretly, known as a Book Cipher. You and your recipient get the same copy of a book and agree to one of a few numbering schemes, the plaintext message becomes numbers that correspond with words in the book.