[curves] Efficiency spreadsheet

[Trevor Perrin]

I'm having fun with this, so I put some "curve efficiency" data into a
spreadsheet:

https://docs.google.com/a/trevp.net/spreadsheet/ccc?key=0Aiexaz_YjIpddFJuWlNZaDBvVTRFSjVYZDdjakxoRkE&usp=sharing#gid=0

I included Microsoft's latest numbers for the 6 new curves they
recommend [1], as well as what I think is their most efficient curve
(ed-254-mont).

If anyone has other interesting data, particularly for competitive
implementations of NIST or safe curves, feel free to send it (e.g.
Kasper's P-224? ARM?)


Trevor

[1] http://patricklonga.webs.com/Presentation_CFRG_Selecting_Elliptic_Curves_for_Cryptography.pdf