what are the sub keys

[Robert J. Hansen]

On Tue, 22 Mar 2011 18:11:37 +0000, Jerome Baum <jerome at jeromebaum.com>
wrote:
> Okay so  let's try again. Correct  me if I'm  wrong on this one,  but it
> does  make  your key  weaker  _compared  with  using an  algorithm  that
> supports 512 bits of hash, all else being equal_, right?

If such an algorithm existed in GnuPG, then yes.  You'd need about RSA-16K
to get your money's worth out of SHA512, though.