Best Practices
John Clizbe
John at Mozilla-Enigmail.org
Tue Dec 14 23:40:19 CET 2010
Ingo Klöcker wrote:
> 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!
In the "multiple subkeys and key transition" thread, I wrote on 12/9/2010 at
16:28 (US/Central):
+> How do elliptic curves compare to RSA today?
+>
+> From the National Institutes of Science and Technology (one of the gold
+> standards for engineering know-how):
+>
+> RSA ECC Sym
+> 1024 160 80
+> 2048 224 112 <+
+> 3072 256 128
+> 7680 384 192
+> 15360 512 256
+>
+> These recommendations can be found on page 63 of NIST Special
+> Publication 800-57, Recommendations for Key Management, Part I. 2nd Revision,
+> 8 Mar, 2007.
+>
[http://csrc.nist.gov/publications/nistpubs/800-57/sp800-57-Part1-revised2_Mar08-2007.pdf]
>
--
John P. Clizbe Inet:John (a) Mozilla-Enigmail.org
FSF Assoc #995 / FSFE Fellow #1797 hkp://keyserver.gingerbear.net or
mailto:pgp-public-keys at gingerbear.net?subject=HELP
Q:"Just how do the residents of Haiku, Hawai'i hold conversations?"
A:"An odd melody / island voices on the winds / surplus of vowels"
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