Introduction If you need to send a secret message to a friend, how could you prevent other people from reading it? One way is to encrypt the message—that is, use a secret code that only you and ...

The Playfair cipher is an incredibLe code system that is both difficult ... Once you know that Q, for example, equals E, then that’s true for every Q in the problem. In the Playfair cipher ...

Here’s everything you need to know about one of the most notorious American serial killers and their secret code. In November 1969, the Zodiac Killer sent a 340-word cipher to the San Francisco ...

You will need to use the decode cipher to solve this ... so keep that in mind. As an example, the first code word I got was 3708, and my characters and codes were as follows: So, if I convert ...

Unfortunately, you can simply yank it open as it has a lock that requires a four digit code. Next to the chest you’ll find a cipher machine along with several lettered reels and documents ...