## On the Subject of the Circle CM

A machine that knows no bounds when it comes to ciphers.

From the Shape Cipher module by TracksJosh.

Create a key using the keyword on screen 1 and the Boolean Expression on screen A. This will be referred to as the Alphabet Key.

Start at the digit in the PI Circle that has an index equal to the number shown on screen 2. The top most digit (orange) has an index of 0 and increases by 1 for each digit in clockwise order.

If the Boolean Expression on screen B is true, the Indicated Direction is clockwise. Otherwise, the Indicated Direction is counter-clockwise

If the Submit Button is white, follow the instructions under Encrypt Instructions. Otherwise follow the instructions under Decrypt Instructions.

#### Encrypt Instructions

• Find the Nth letter of the encrypted word and find it in the Alphabet Key.
• Go to the right a number of times equal to the Current Digit in the PI Circle, wrapping around when necessary.
• The letter you end up on becomes your Nth decrypted letter.
• Go an X amount of times in the Indicated Direction in the PI Circle where X is equal to the alphabetic position (A1Z26) of the Nth encrypted letter.

#### Decrypt Instructions

• Find the Nth letter of the encrypted word and find it in the Alphabet Key.
• Go to the left a number of times equal to the Current Digit in the PI Circle, wrapping around when necessary.
• The letter you end up on becomes your Nth decrypted letter.
• Go an X amount of times in the Indicated Direction in the PI Circle where X is equal to the alphabetic position (A1Z26) of the Nth decrypted letter.

Do this for each letter of the encrypted word to get your decrypted word.

### PI Circle V2

3141592653 5897932384 6264338327 9502884197 1693993751 0582097494
4592307816 4062862089 9862803482 5342117067 9821480865 1328230664