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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Thanks! This is much easier for me to use.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Bernhard Amann [mailto:bernhard@ICSI.Berkeley.EDU] <br><b>Sent:</b> Monday, December 17, 2012 1:05 PM<br><b>To:</b> ben@digicert.com<br><b>Cc:</b> observatory@eff.org<br><b>Subject:</b> Re: [SSL Observatory] The Trust Tree: An interactive graph of the CA ecosystem<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Hi,<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>sorry that it took a while - but I created a second version now that simply<o:p></o:p></p></div><div><p class=MsoNormal>removes all sub-CAs of the DFN. It is available at <o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><a href="http://notary.icsi.berkeley.edu/trust-tree-no-dfn/">http://notary.icsi.berkeley.edu/trust-tree-no-dfn/</a><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>(I know - something where you could remove it live would be nicer. Perhaps<o:p></o:p></p></div><div><p class=MsoNormal>in the future…)<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Bernhard<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On Dec 14, 2012, at 8:18 AM, Ben Wilson <<a href="mailto:ben@digicert.com">ben@digicert.com</a>> wrote:<o:p></o:p></p></div><p class=MsoNormal><br><br><o:p></o:p></p><div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I’d like an option that removes or shrinks the DFNVerein PKI. </span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p></div><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><div><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span class=apple-converted-space><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> </span></span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><a href="mailto:observatory-bounces@eff.org">observatory-bounces@eff.org</a> [mailto:observatory-<a href="mailto:bounces@eff.org">bounces@eff.org</a>]<span class=apple-converted-space> </span><b>On Behalf Of<span class=apple-converted-space> </span></b>Bernhard Amann<br><b>Sent:</b><span class=apple-converted-space> </span>Thursday, December 13, 2012 10:24 PM<br><b>To:</b><span class=apple-converted-space> </span><a href="mailto:observatory@eff.org">observatory@eff.org</a><br><b>Subject:</b><span class=apple-converted-space> </span>[SSL Observatory] The Trust Tree: An interactive graph of the CA ecosystem</span><o:p></o:p></p></div></div></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal>Hi All,<o:p></o:p></p></div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div><div><div><p class=MsoNormal>We just released an interactive graph that shows the relationship<o:p></o:p></p></div></div><div><div><p class=MsoNormal>between the root-CAs of the Mozilla root-store and their intermediates <o:p></o:p></p></div></div><div><div><p class=MsoNormal>at <a href="http://notary.icsi.berkeley.edu/trust-tree/"><span style='color:purple'>http://notary.icsi.berkeley.edu/trust-tree/</span></a>. <o:p></o:p></p></div></div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div><div><div><p class=MsoNormal>Root-CAs are pictured as red nodes, intermediate CAs are green. <o:p></o:p></p></div></div><div><div><p class=MsoNormal>The node diameter scales logarithmically with the number of <o:p></o:p></p></div></div><div><div><p class=MsoNormal>certificates signed by the node. Similarly, the color of the green <o:p></o:p></p></div></div><div><div><p class=MsoNormal>nodes scales proportional to the diameter.<o:p></o:p></p></div></div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div><div><div><div><p class=MsoNormal>The data source for this graph is the ICSI SSL notary [1], which was<o:p></o:p></p></div></div><div><div><p class=MsoNormal>previously mentioned on this mailing list. We have been passively <o:p></o:p></p></div></div><div><div><p class=MsoNormal>monitoring the Internet uplinks of a number of (mostly) edu<o:p></o:p></p></div></div><div><div><p class=MsoNormal>networks for certificate and SSL information for about 10 months.<o:p></o:p></p></div></div></div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div><div><div><p class=MsoNormal>Clicking on individual nodes reveals additional information about the <o:p></o:p></p></div></div><div><div><p class=MsoNormal>CAs, especially the number of valid child certificates we currently <o:p></o:p></p></div></div><div><div><p class=MsoNormal>know for it.<o:p></o:p></p></div></div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div><div><div><div><p class=MsoNormal>In the graph, the CA that directly signed the largest number of certificates<o:p></o:p></p></div></div><div><div><p class=MsoNormal>is the Go Daddy Secure Certification Authority, an intermediate of <o:p></o:p></p></div></div><div><div><p class=MsoNormal>GoDaddy. Our current dataset contains over 74,000 certificates <o:p></o:p></p></div></div><div><div><p class=MsoNormal>that it signed.<o:p></o:p></p></div></div></div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div><div><div><div><p class=MsoNormal>The DFN-Verein CA has signed the largest number of intermediate <o:p></o:p></p></div></div><div><div><p class=MsoNormal>CA certificates. As you might know it provides certificates for <o:p></o:p></p></div></div><div><div><p class=MsoNormal>many German higher education and research institutions. It creates <o:p></o:p></p></div></div><div><div><p class=MsoNormal>a unique sub-CA for each institution for which it issues certificates.<o:p></o:p></p></div></div><div><div><p class=MsoNormal>Our data set currently contains more than 200 sub-CAs of it.<o:p></o:p></p></div></div><div><div><p class=MsoNormal>The DFN does this for administrative reasons. The control of the<o:p></o:p></p></div></div><div><div><p class=MsoNormal>private keys of all sub-CAs remains at the DFN and they check<o:p></o:p></p></div></div><div><div><p class=MsoNormal>each certificate request.<o:p></o:p></p></div></div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div></div><div><div><p class=MsoNormal>If you have any questions or comments about this, please let us<o:p></o:p></p></div></div><div><div><p class=MsoNormal>know.<o:p></o:p></p></div></div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div><div><div><p class=MsoNormal>Bernhard<o:p></o:p></p></div></div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div><div><div><p class=MsoNormal>[1]: <a href="http://notary.icsi.berkeley.edu/trust-tree/"><span style='color:purple'>http://notary.icsi.berkeley.edu/</span></a><o:p></o:p></p></div></div></div></div><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>