Key for Exercises 1&3 1. Ciphertext: NYJY! JNYJXYAHJARO! OJS JXYJA! FI (4 points) Plaintext: The following information was extracted from The BLACK Chamber's Pigpen Cipher page. The content is available at https://simonsingh.net/The_Black_Chamber/pigpen.html. "The Pigpen Cipher was used by Freemasons in the 18th Century to keep their records private. The cipher does not substitute one letter for another; rather it substitutes each letter for a symbol. The alphabet is written in the grids shown, and then each letter is enciphered by replacing it with a symbol that corresponds to the portion of the pigpen grid that contains the letter." The key is 2. You have received the following pigpen ciphertext: Decipher the ciphertext. (3 points) Plaintext: 3. The plaintext extracted in exercise 2 is ciphertext encrypted using a substitution cipher, whose key is shown at the top of the page. What is the original message? ( 3 points) Ciphertext: Original message