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1687260
Solving the Double Keyword Cipher
Description
Mind Map on Solving the Double Keyword Cipher, created by Yasmin F on 22/11/2014.
No tags specified
gcse
computing
double keyword
cipher
Mind Map by
Yasmin F
, updated more than 1 year ago
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Created by
Yasmin F
almost 10 years ago
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0
Resource summary
Solving the Double Keyword Cipher
Iteration (loops)
If the user hasn't inputted a message, then they will outputted with the same question until they do.
If the user hasn't inputted a key, then they will outputted with the same question until they do.
Selection (decision)
To ask whether the user wishes to encrypt, or decrypt a message.
Lists
To be able to list letters of the alphabet.
To be able to list the special characters that should be recognisable to my programme (without outputting errors)
To be able to validate the work
To ensure the appropriate messages are being inputted (particularly the individual characters).
Modulus
So the alphabet may loop together to make encryption and decryption more effective.
Encryption
To fulfil the criteria of this task.
So the programme knows what function to apply to the message inputted.
Decryption
To fulfil the criteria of this task.
So the programme knows what function to apply to the message inputted.
Ask for a message/key
To fulfil the criteria of this task
Print
To output the final result (encrypted message/decrypted message.
Text file
I will need a text file to relay information from PyScripter onto a plain white file (for aesthetics).
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