MixColumns

From this window we wcan test the functioning of the MixColumns operation, a mixing operation that operates in the columns of the matrix, combining the four bytes in each column by using a linear transformation.

In the Input field we can introduce each cell of the matrix as pairs of hexadecimal values.

In order to do so, we can manually enter each value of the matrix, or paste the contents of the clipboard to ease this task. This operation and the other ones commented can be found in the menu "Edit".

We can also fill in the matrix with random values by pressing the "Random" button.

By pressing the "Run" button, the operation MixColums will be performed after checking that all the entered data is correct.

By pressing the button "Back" we will return to the operation window.

For a more detailed information on the functioning of the MixColumns operation, please see:
MixColumns explanation