1. CRYTOGRAPHY
PIGPEN CIPHER

2. Contents Introduction History Advantages Disadvantages
Explanation (how it works)
Illustrated examples
TEST!
Cracking the code (how to break it)

3. Introduction Simple substitution cipher for symbols based on a grid.
Encryption system developed by the Freemasons.

4. History Developed in 18th century AD.
Used by the Freemasons for keeping record-keeping and correspondence private
Correspondence - Non-concurrent, remote communication between people
Freemasonary is a fraternal organisation that arose from obscure origins in the late 16th to early 17th century. The various forms all share moral and metaphysical ideals, which include, in most cases, a constitutional declaration of belief in a Supreme Being.[3]

5. History 1860s – American Civil War
Became popular for encrypting messages

6. History Origins of “PIGPEN” Monoalphabetic Key can be changed
the letters of the alphabet – the “pigs” are trapped within the lines – the “pens.” The shapes made by these “pens” either with or without a dot, represent the letters inside.

7. Advantages Variability Easy for encrypting party
Easy for receiving party
pigpen cipher advantages : firstly, different keys can be used, so it can be varied
gabriel Simply Exquisite- when the skies turn red says:
second, it is easy to encrypt in comparison to modern day complicated ones
third, it is easy for the receiving party to read it once they have the cipher keys (legends)
disadvantages : firstly, it is monoalphabetic (meaning only one alphabet assigned to one symbol), thus easy for hackers to crack the code
Next, once the code is easily cracked as mentioned above, the encrypted documents can be read like an open book
it is easily cracked too by using fundamental methods like "frequency analysis" , which gabriel will talk about later on.

8. Disadvantages Monoalphabetic Not sophisticated enough Easily cracked
Frequency analysis
pigpen cipher advantages : firstly, different keys can be used, so it can be varied
gabriel Simply Exquisite- when the skies turn red says:
second, it is easy to encrypt in comparison to modern day complicated ones
third, it is easy for the receiving party to read it once they have the cipher keys (legends)
disadvantages : firstly, it is monoalphabetic (meaning only one alphabet assigned to one symbol), thus easy for hackers to crack the code
Next, once the code is easily cracked as mentioned above, the encrypted documents can be read like an open book
it is easily cracked too by using fundamental methods like "frequency analysis" , which gabriel will talk about later on.

9. Explanation (how it works)

10. ILLUSTRATIONS

11. TEST

13. Decrypt This

14. ANSWER

15. Mathematics of passwords rule
Encrypt This
Mathematics of passwords rule

16. Answer!

17. Cracking the Code Frequency Analysis  Al-Kindi E
Given a long english text, some alphabets would occur more frequently than others.
Frequencies are usually relatively consistent when an english text is compared to another of the same length.
How to crack – Link the most frequently used letter to the most frequently occurring letter with the most frequently seen symbol  link least to least  so on and so forth  fine tune

18. Thank You
Done by: Gabriel, Darren, Yi Fan