Secret Codes #5
In Secret Codes #4 you solved a Caesar cipher (you did solve it, right?). That cipher shifted each letter of a message to another letter in the alphabet a fixed number of positions away. So it's one form of substitution cipher.
The enciphered message here doesn't change letters into other letters, but scrambles the message in a particular way. It's a transposition cipher. Welcome to rail fence cryptography!
Rail fence ciphers are used to write a message in a zigzag form, then the letters are ordered linearly from left to right. What you need to know is how many "rails" there are -- HORIZONTAL lines -- as the key. Here's an example of how to encipher a message with a key of 4. The arrow shows the direction to write the message.
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I'm really enjoying these Secret Code badges! Thank you for the mind-bending fun! I'm excited to see the next interesting and fun challenge. Thank you!
That's great to hear! They are a lot of fun to make. Some of them will get a bit tricky as we go along so keep on your toes!