The Pigpen Cypher
A Simple Geometric Substitution Cypher used by the Freemasons for 200 years, but variations date back to the 11th Century or even earlier.
It simply replaces each letter with a symbol based on a grid and dots. It is highly susceptable to letter frequency analysis and thus easily broken.
Inputs and Outputs
Plain Text
Key (note shape containing each letter)
Cypher Text
Instructions: Type into either the Plain Text or Cypher Text boxes to see the encryption in action.