[Cryptech Core] ModExp test results

[Randy Bush]

>                               1024            2048            4096
> --------------------------------------------------------------------------
> Old ModExp encrypt            5.837198        35.920986       267.222054
> Old ModExp decrypt            5.489668        35.583835       268.625344
> Old CRT decrypt               14.142096       104.246679      802.028670
> Old keygen/encrypt/decrypt    68.106694       679.259678      6305.303504
> 
> SW CRT decrypt                0.359630        0.396882        3.450447
> SW keygen/encrypt/decrypt     2.406200        15.713556       377.959982
> 
> New ModExp encrypt            0.608936        [x] 0.497601    [x]
> New ModExp decrypt            3.711576        [x] 23.882598   [x]
> New CRT decrypt               9.749045        [x] 29.750953   [x]
> New keygen/encrypt/decrypt    67.868772       [x] 512.707423  [x]

unless the fpga code improves radically, i.e orders of magnitude, yes
orders plural, we may want to go with software rsa in praha.

randy