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Re: [Uta] updated I-Ds

Daniel Kahn Gillmor <dkg@fifthhorseman.net> Tue, 25 February 2014 21:42 UTC

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Date: Tue, 25 Feb 2014 16:42:03 -0500
From: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
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To: Watson Ladd <watsonbladd@gmail.com>
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Subject: Re: [Uta] updated I-Ds
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On 02/25/2014 04:35 PM, Watson Ladd wrote:
> I redid the arithmetic and it looks like I was off/made a typo. Take
> L(n)=c*e^{(log n)^a*(loglog n)^(1-a)} with a 1/3, figure out the constant,
> and plug in the lengths.
> 
> Redoing it I get 8000 core years for DH modulo a 1024 bit prime and about 4
> billion core years for 2048 bit prime.

Thanks for clarifying.  This closer to what i was expecting.

> The point is DHE with the 1024 bit prime is much weaker than other
> algorithms being considered.

Yes, agreed.  DHE-1024 needs to be deprecated.

	--dkg

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