Round 2 Using the matrix from round 1, rotate the first row left by 1, second row left by 2,
third row left by 3, and reverse the order of the fourth row.
In our example:
HAHAHHAH
Now, add each column mod 26 and add the result to the running total. The new
running total is (5, 7, 9, 11). This running total is now the input into the first round
of the compression function for the next block of text. After the final block is
processed, convert the final running total to letters. For example, if the message is
ABCDEFGHIJKLMNOP, then the hash is FHJL
đang được dịch, vui lòng đợi..
