- Tic-Tac-Toe Code
This codes swaps regular letters with parts of a tic-tac-toe board. It works like this:
- Julius Caesar Code
Swap each letter with a letter further three down further the alphabet.
An "A" in the original message become a "D" in the secret message, a "B" become "E", and so forth.
"Hello World" becomes "KHOOR ZRUOG"