Ancient Secret Codes: From Caesar Cipher to Samurai Invisible Ink 🗝️

Discover how ancient civilizations kept secrets before computers! Learn about Julius Caesar's famous Caesar cipher, samurai using rice water invisible ink in Japan's Edo period, and Mary, Queen of Scots' coded letters. These early cryptography techniques paved the way for modern encryption. Watch now to uncover the fascinating history of secret messages and how simple tricks protected secrets from spies and enemies!