what are the sub keys

[Robert J. Hansen]

On Tue, 22 Mar 2011 10:45:21 -0400, Scott Lambdin <lopaki at gmail.com>
wrote:
> OMG - This will get Robert going!

Why would it?  I think the obsession with key length is bikeshedding. 
Find a level of security that's appropriate for your needs, use that level,
and stop worrying about it.  If you're one of the (very few) who has a
30-year need for security, then yes, a 4K RSA key is useful insurance
against the future.