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<div class="moz-cite-prefix">On 12/13/2012 01:01 AM, Garonda Rodian
wrote:<br>
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May I note that at least one reference from a major government
agency (U.S. NIST SP 800-131A, <span class="url">csrc.<b>nist</b>.gov/publications/<b>nist</b>pubs/800-131A/<b>sp800-131A</b>.pdf</span>
) states that for DH to be "Acceptable" as of Jan 1, 2011, the
|p| must be >= 2048 bits, with a |q| of >= 224 bits. 1024
bits <= |p| < 2048 bits and 160 bits <= |q| < 224
bits is listed as "Deprecated" through Dec 31, 2013.<br>
<br>
If we plan on moving to Elliptical Curve prior to 2014, then I
don't have a major issue with 1536 bit DH, but if that's not
fairly certain, I too would urge a shift to at least a 2048 bit
|p| and at least a 224 bit |q| value on the DH side.<br>
<br>
<br>
Alternately, would it be practical to devote a bit to "security
level", so that can be negotiated also, for those cases where
larger keys is a major issue - that will also put the framework
in place for future elliptical curve algorithms.<br>
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Thanks for this information. So one year is left to either switch to
2048bit or, if it's not hard to implement, to ECC. <br>
And what are a few years difference on the big scale? I'd say v4.1,
released in a few months, should use 2048bit and case closed :) Then
you have enough time to look at ECC :)<br>
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