🔐 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/polybius-square/ #ImperiumRomanum #AncientRome #Polybius #Cipher #Cryptography #AncientGreece #History #RomanEmpire #Archaeology #AncientWorld #HistoryFacts #PolybiusSquare