The Pigpen Cipher is a substitution cipher used to encrypt and decrypt messages. It derives its name from its distinctive grid-like shape, which resembles the enclosures or used for pigs on farms. The origins of the Pigpen Cipher are shrouded in mystery, but it is believed to have been in use as early as the th century. It gained prominence during the and found frequent use among secret societies like the .
The Pigpen Cipher employs a grid composed of vertical and horizontal , with each letter of the alphabet assigned a specific geometric . These letters are positioned within the grid, and the corresponding shape serves as the substitute in the message. To encrypt a message using Pigpen, simply copy down the part of the cipher key grid corresponding to the .
