Best Practices

[Ingo Klöcker]

On Tuesday 14 December 2010, Robert J. Hansen wrote:
> Off by about a factor of 100 there.  RSA-2048 is roughly equivalent
> to a 112-bit symmetric key; RSA-1024 is roughly equivalent to an
> 80-bit key. 32 bits of difference equals a factor of four billion. 
> It's way harder than you think.

Those equivalences have been mentioned a few times. Is there a good 
(freely available) reference for this? Thanks in advance!


Regards,
Ingo
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