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The National Cipher Challenge

Reply To: Maths

#96311
molleculeYT
Participant

The substitution tool is very confusing could you explain it?

We must do something about that sometime! You can type letters in the boxes under the alphabet to define a substitution cipher. If you type X under a then every a in your plaintext will be converted to an X.

When you paste some text into the box it immediately encrypts it using the cipher you define.

If instead you want to decrypt a cipher text and think you know the substitution alphabet then proceed as follows: Treat the alphabet as cipher letters and in the box under each letter of the alphabet type the plain text character that you think corresponds to it. Now when you paste the cipher text into the box it will be automatically deciphered. Hope that helps. Harry

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