On 11 October 2011 22:32, Robert J. Hansen <r...@sixdemonbag.org> wrote: > Accurate to 6%, there are 2**25 seconds in a year. Worth remembering: > it makes certain kinds of computations much easier. (It follows there > would be about 2**35 seconds in a thousand years, or 2**45 seconds in a > million.) > > E.g., let's say you want to brute-force an 64-bit key on a CPU that can > do a million (2**20) attempts per second. This requires, on average, > 2**63 attempts. 2**63 / 2**20 = 2**43 seconds: 2**43 / 2**45 = 2**-2 = > a quarter of a million years. > > I don't know why it took me so long to notice that: seems like the sort > of thing I should've noticed a decade ago. It makes certain kinds of > computations so much easier. > > Anyway, figured I'd throw it out on the off chance there were others who > hadn't noticed it.
I used to think of there being roughly 2^32 seconds in a lifetime :) > > _______________________________________________ > Gnupg-users mailing list > Gnupg-users@gnupg.org > http://lists.gnupg.org/mailman/listinfo/gnupg-users > _______________________________________________ Gnupg-users mailing list Gnupg-users@gnupg.org http://lists.gnupg.org/mailman/listinfo/gnupg-users
