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<div class="moz-cite-prefix">Why was the list of ECDSA curves
limited to the NIST ones, instead of specifying a list of
characteristics (field size, curve type, ...)?<br>
This prevents the use of other standardized curves such as
Brainpool ones (RFC5639), and more local ones such as French ANSSI
ones.<br>
<br>
<pre class="moz-signature" cols="72">--
Erwann ABALEA
</pre>
Le 08/03/2013 22:38, Rick Andrews a écrit :<br>
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<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">To
address everyone’s questions:<o:p></o:p></span></p>
<p class="MsoListParagraph"
style="text-indent:-.25in;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><span
style="mso-list:Ignore">-<span style="font:7.0pt
"Times New Roman"">
</span></span></span><!--[endif]--><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">FIPS
186 originally allowed for DSA 1024 bits max, but in the
186-3 revision 2048 and SHA-2 were added.<o:p></o:p></span></p>
<p class="MsoListParagraph"
style="text-indent:-.25in;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><span
style="mso-list:Ignore">-<span style="font:7.0pt
"Times New Roman"">
</span></span></span><!--[endif]--><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">ECDSA
is allowed in the BRs; Appendix A allows P-256, P-384, or
P-521 curves<o:p></o:p></span></p>
<p class="MsoListParagraph"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-indent:-.25in;mso-list:l0
level1 lfo1">
<!--[if !supportLists]--><span
style="font-family:"Calibri","sans-serif""><span
style="mso-list:Ignore">-<span style="font:7.0pt
"Times New Roman"">
</span></span></span><!--[endif]--><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Does
it present any issues that are different from RSA algorithm
certs? AFAIK, just what Erwann listed below (it can be used
for signature only, not encryption/decryption). I haven’t
heard of any particular vulnerabilities. In fact, the “Ron
was wrong, Whit is right” paper (<a moz-do-not-send="true"
href="http://eprint.iacr.org/2012/064.pdf">http://eprint.iacr.org/2012/064.pdf</a>)
suggests that there are advantages to cryptosystems like DSA
that require only a single secret during key setup.</span><o:p></o:p></p>
<p class="MsoListParagraph"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-indent:-.25in;mso-list:l0
level1 lfo1">
<!--[if !supportLists]--><span
style="font-family:"Calibri","sans-serif""><span
style="mso-list:Ignore">-<span style="font:7.0pt
"Times New Roman"">
</span></span></span><!--[endif]--><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Same
authentication processes and security considerations? I
don’t see why not.</span><o:p></o:p></p>
<p class="MsoListParagraph"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-indent:-.25in;mso-list:l0
level1 lfo1">
<!--[if !supportLists]--><span
style="font-family:"Calibri","sans-serif""><span
style="mso-list:Ignore">-<span style="font:7.0pt
"Times New Roman"">
</span></span></span><!--[endif]--><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Can
only government agencies obtain these certs, or can any
user? Anyone can. We expect more interest from government
customers given its inclusion in FIPS 186-3, but there are
no restrictions</span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">-Rick<span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<br>
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