Because there is a fixed amount of overhead associated with each of the individual
encrypted blocks, the bitstream size grows larger as the blocks are made
increasingly smaller when using the configuration counting random data attack
solution. This creates a trade-off that must be considered (configuration storage
and time vs. security level). When using key rolling with configuration counting,
there is always at least an approximate 14% increase in bitstream size. As the block
size decreases (becomes more secure), the bitstream size increases and causes a
longer configuration time. The following figure illustrates how bitstream size grows
(y-axis) as the as the number of blocks per key are made smaller (x-axis).
Figure 1. Key Rolling With Configuration Counting Trade-off