Скачать или смотреть 🔐 The Polybius Square – Ancient Greek Cipher 🏛️

The Polybius Square, also known as the Polybius Checkerboard, is a fascinating example of ancient cryptography 📜 — a monoalphabetic cipher where each letter corresponds to a pair of numbers. It was named after the Greek historian Polybius, who improved a system originally developed by Cleoksenos and Democletus.

🔲 The cipher consisted of five tablets, each containing five Greek letters.
🔥 It allowed messages to be sent secretly — even through light or smoke signals!
💡 Though no original tablet has survived, Polybius’s concept inspired later encryption systems.

📖 Read more: https://imperiumromanum.pl/en/curiosities/...

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