Double Keyword Cipher

Double Keyword Cipher

1. Encryption

   • Asks the user to enter a mesasge.
     • Converts into numbers
   • Asks the user to enter a keyword
     • Converts into numbers
   • Asks the user to enter a second keyword
     • Converts to numbers
   • Adds all numbers together.
     • OUtputs final mesasge

2. Decryption

   • Asks the user to enter a message
     • Converts to numbers
   • Asks the user to enter a keyword
     • Convertsinto numbers
   • Asks the user to enter a second keyword
     • Converts into numbers
   • Subtracts all the numbers
     • Outputs a final message

3. Programming techniques

   • I could use iteration
     • Used to find the position of the letter
   • I could use selection statments
     • Mostly used to make a menu
   • Use lists for the alphabet
   • Use raw_input for inoutting a word.