Re: How secure is 2048 bit RSA?
From: Roger Schlafly (rogersc1_at_mindspring.com)
Date: 04/12/04
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Date: Mon, 12 Apr 2004 09:19:19 -0700
"Paul Crowley" <paul@JUNKCATCHER.ciphergoth.org> wrote
> > It does not make sense. Using a 256 bit AES key
> > is in and of itself crazy.
> Ross Anderson disagrees with you; at AES3 he advised the use of
> 256-bit keys to defend against attacks in which small amounts of key
> material are leaked through side channels. I'm not sure I agree with
> his reasoning but it's not a crazy thing to think.
If you are leaking key bits, then the solution is to plug the leak;
not to just use a larger key size.
If, say, you leak just 1 key bit with every message, it may not be
long before you have no security at all.
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