On Wed, 22 Apr 2009, Shane Kerr wrote:

I don't think this is a waste, really. I think if we recommend 1024 as
the text does, then we'll have to revisit it in 3 or 4 years.

Is this for ZSK or KSK? Because if you pick equal sizes, then both would be
equally vulnerable to the same brute force attack, and often cycling a ZSK of
equal size to the KSK key does not make much sense - the attackers would
just ignore the ZSK and go for the KSK instead. So using a 2048 ZSK sort
of implies using a larger KSK. Unless you keep the ZSK for 6 months or so.

Paul
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