The Substitute

Solution from Last Time:

In our last post, we used the Caesar Cipher with a shift of three to decode the following message:

K H O O R D Q G Z H O F R P H W R F R G H E U H D N L Q J

Applying a shift of three places to the left, the hidden message was:

“HELLO AND WELCOME TO CODE BREAKER”

Great job to everyone who cracked the code!

Today's Cipher Challenge:

We’re exploring a new puzzle today with the Substitution Cipher, a method where each letter in the plaintext is replaced with another letter from a fixed substitution alphabet.

The Encrypted Message:

Z B W F Y X R L D K V O E P J N I Q C A M U H G T S

Background:

In the Substitution Cipher, each letter in the plaintext is substituted with a letter from a fixed, randomly shuffled alphabet. For this challenge, we’re using the following substitution alphabet:

  • Plaintext Alphabet: ABCDEFGHIJKLMNOPQRSTUVWXYZ
  • Substitution Alphabet: XPMGJWLZVNTSBDFHCRQOIEAKUY

Decoding Instructions:

  1. Identify the Substitution Alphabet: Use the provided substitution alphabet to map each letter from the encrypted message to the corresponding letter in the plaintext alphabet.

  2. Apply the Mapping: For each letter in the encrypted message, find its corresponding letter in the plaintext alphabet using the substitution key.

  3. Reveal the Message: Once you’ve applied the mapping, the hidden message will be uncovered!

Example Mapping:

  • If Z in the encrypted message maps to A in the plaintext alphabet, then replace Z with A.

Solution Challenge:

Decode the message:

Z B W F Y X R L D K V O E P J N I Q C A M U H G T S

What’s the hidden message? Share your solutions in the comments below, and we’ll reveal the answer in our next post!

Happy decoding, and stay tuned for more crypto!

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