The value is the cipher key. For example, the code IBDLBEBZ is encrypted with a Caesar Cipher. It doesn’t take very much to see that a shift of “1” would reveal HACKADAY.

Pick up the Code Table document immediately right of the cipher machine and find the word BIER. Alongside it is the code 4134. Head over to the chest and dial in the code to open it.

An agent hands the text to a cipher clerk, who uses a code book to convert the words to four-digit numbers: 2. The clerk shifts one digit to the first group from the second, ...

Once all of the Code Wheels are in place, close the lid of the Cipher Machine. Now you can spin the wheels to show JÖGM across the top row. Image: MachineGames/Bethesda Softworks via Polygon ...

Dubbed the “340 cipher,” the message was unraveled by a trio of code breakers – David Oranchak, a software developer in Virginia, Jarl Van Eycke, a Belgian computer programmer, and Sam Blake ...

Cryptologists found and decoded over 50 long-lost letters that Mary, Queen of Scots wrote during her time in captivity. A historian calls them the most important new findings about her in 100 years.