Season 2 for Black Ops 6 and Warzone has arrived, bringing a plethora of new content for players to dive into. From the debut ...

You can make a message secret in countless different ways. One common way is to use a substitution cipher, in which one letter is substituted for another. Another is to employ a transposition cipher, ...

Hannah handed me a piece of paper with the following string of letters. “Each letter stands for another one,” said Hannah. “Ooh, a substitution cipher!” I thought. But I was stumped. “Is this just one ...

J K Rowling’s The Hallmarked Man features the Pigpen Cipher, a centuries-old code once used by Freemasons and revolutionaries ...

What does it mean? Well, intrepid Business Insider readers realized quickly it was a substitution cypher, something that is pretty simple to solve. In this case, c in the cypher is t, and d in the ...