Secret Messages Hidden in Victorian Postcards!

During the Victorian era, spies utilized postcards with tiny holes to discreetly send secret messages. This clever technique played on the era's obsession with codes, facilitating **digital communication** without raising suspicion. The use of **data hiding** allowed for secure exchange of information, highlighting early forms of **cryptography** and strategies for **anti forensics**. The tiny holes, strategically placed, would align with letters on the card, spelling out a hidden message.