Solving the Double Keyword Cipher

Yasmin F
Mind Map by Yasmin F, updated more than 1 year ago
Yasmin F
Created by Yasmin F over 6 years ago
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Description

Mind Map on Solving the Double Keyword Cipher, created by Yasmin F on 11/22/2014.

Resource summary

Solving the Double Keyword Cipher
  1. Iteration (loops)
    1. If the user hasn't inputted a message, then they will outputted with the same question until they do.
      1. If the user hasn't inputted a key, then they will outputted with the same question until they do.
      2. Selection (decision)
        1. To ask whether the user wishes to encrypt, or decrypt a message.
        2. Lists
          1. To be able to list letters of the alphabet.
            1. To be able to list the special characters that should be recognisable to my programme (without outputting errors)
            2. To be able to validate the work
              1. To ensure the appropriate messages are being inputted (particularly the individual characters).
              2. Modulus
                1. So the alphabet may loop together to make encryption and decryption more effective.
                2. Encryption
                  1. To fulfil the criteria of this task.
                    1. So the programme knows what function to apply to the message inputted.
                    2. Decryption
                      1. To fulfil the criteria of this task.
                        1. So the programme knows what function to apply to the message inputted.
                        2. Ask for a message/key
                          1. To fulfil the criteria of this task
                          2. Print
                            1. To output the final result (encrypted message/decrypted message.
                            2. Text file
                              1. I will need a text file to relay information from PyScripter onto a plain white file (for aesthetics).
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