In 1854, Sir Charles Wheatstone invented the cipher known as "Playfair," named ... omitting repeated letters and combining I and J in one cell. In this example, we use the keyword MANCHESTER ...

Next to the chest you’ll find a cipher machine along with several lettered reels and documents – all clues to cracking the code and getting to the bottom of the Counting Letter mystery.

The Zodiac Killer had sent the cipher in three parts to three local newspapers with a handwritten letter attached that confirmed his identity. Donald and Bettye Harden, a puzzle-loving couple ...

A cipher is a code used to protect information ... Put the small circle with the letters on it on top of the larger one, lining up the letters. Put the split pin through the centre to secure ...

This guide will show players how to complete the Captain's Cipher puzzle in Indiana Jones and the Great Circle.

Like the Playfair, the Double Playfair cipher uses 5x5 squares ... IS FULL OF EELS," we begin by choosing a period or number of letters (say, seven), then breaking the message into groups of ...