![]() If the secret key is “secret”, the matrix should look as in the picture below. Let’s start with an example of how the matrix should look like. Keep reading for you to see examples of each step and rule, and the full Python code for the cipher. If the two letters are not in the same row and column, then you substitute each letter by the letter in the same row and the column of the second letter.The next letter of the last in a column is the first letter in that column. If the two letters fall in the same column of the matrix, you substitute them with the next letter in the column (going down).The next letter of the last in a row is the first letter in that row. If the two letters fall in the same row of the matrix, you substitute them with the next letter in the row. ![]()
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