Quadrant analysis (408)

= Key =

= Data =

= Plot =

This is a plot of repeated 2-gram counts for the non-rotated and non-flipped 408 cipher, showing how the counts are affected by varying the quadrant intersection point (i,j). The bottom front axis is the column j. The right axis is the row i.  The left axis is the count of repeated 2-grams.



You can easily see that the maximums occur at or near (i,j) = (0,0), which is the original cipher without quadrants.