#29 Pigpen/Masonic Cipher

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#Cryptography

LECTURE #29: PIGPEN/MASONIC CIPHER

[INTRODUCTION]
The Pigpen cipher is another example of a substitution cipher, where each letter is replaced by symbols and not the regular type of letters. The cipher has an interesting history, where it was widely used by many groups such as the Freemasons, which is a secret society back in 18th century. It is also called as Freemasons or Masonic cipher because it is mostly used by freemasons as means of communication during the American Civil War.

[ENCRYPTION]
The encryption process is very easy. Whereas you are going to replace each letter with the assigned symbol. The symbols designated to the letters using the key is shown below.

( LOOK AT THE FIRST PICTURE BELOW)

The key to the Pigpen Cipher is easy to remember, where the letters are replaced by each symbol in the grid system.

[DECRYPTION]
The decoding process is simply reversing the entire encrypting process. Using the same key (the grid system above), you can locate the image shown in the cipher text and replace it with the letter given by that portion of the grid.

More DICUSSIONS about the PIGPEN/MASONIC cipher:
The Pigpen cipher was used by the Freemasons in many stages of their lives, and one of the most common can still be seen today, which are present on gravestones. See picture below to clearly see the Pigpen Cipher.

(LOOK AT THE 2ND AND THIRD PICTURE BELOW)

Notice that at the top of the gravestones. The inscription appears to read as “Thomas Brierley made his ingress July 16th 1875”, which was believed that this was the date where he joined the Freemasons.
There are also many possible variations of the Pigpen Cipher. In the above example, the symbol for “s” is not standard. The most common variants include changing the order from: GRID, GRID, X, X (refers to the grid system above) to GRID, X, GRID, X (shown BELOW)

(LOOK AT THE 4th PICTURE BELOW)

or even placing the letters alternately into the grids ( as shown in the 5th picture below).

One final method for changing the Pigpen cipher is by using three (3) grids. (LOOK AT THE 6TH PICTURE BELOW)

[GAME]
Let us test your learning. Use the standard Pigpen Cipher to decrypt these symbols. (LOOK AT THE LAST PICTURE BELOW)

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