Cryptography fun facts:

1. 🔐 The word "cryptography" comes from the Greek words "kryptos" (hidden) and "graphein" (to write), literally meaning "hidden writing."

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2. 🏺 Ancient Egyptians used simple substitution ciphers to encode their messages over 4,000 years ago, making cryptography one of the oldest sciences.

3. 💌 Julius Caesar developed one of the earliest known encryption techniques, now called the Caesar Cipher, shifting each letter three places in the alphabet.

4. 🕵️‍♂️ During World War II, the German Enigma machine was considered unbreakable until Allied codebreakers, including Alan Turing, cracked its code, significantly impacting the war’s outcome.

5. 🧩 The Enigma machine's encryption was so complex that it had 150,738,274,937,250 possible settings, making it a formidable challenge for cryptanalysts.