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</o:shapelayout></xml><![endif]--></head><body lang=EN-IE link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>Brad,<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>This helps, somewhat, but falls short in that it doesn’t provide code for all the checks in Bruce’s proposal document. And although the class contains a method to check if two strings are confusable, we’re left wondering how we are to use that method. One of the strings will be a U-label in the FQDN that the subscriber is enrolling with, but what’s the other string? Would we have to make that call repeatedly to check the U-label against the Alexa One Million? The domain names of all certs in our db?<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>-Rick<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> public-bounces@cabforum.org [mailto:public-bounces@cabforum.org] <b>On Behalf Of </b>Hill, Brad<br><b>Sent:</b> Thursday, August 23, 2012 11:30 AM<br><b>To:</b> public@cabforum.org<br><b>Subject:</b> [cabfpub] Implementation of UTR-36 confusable text security considerations.<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-US>In response to questions on today’s call about implementations about the confusable Unicode restrictions suggested for inclusion in BR 1.1, I can suggest the International Components for Unicode library:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US><a href="http://site.icu-project.org/">http://site.icu-project.org/</a><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>And, specifically, the SpoofChecker class:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US><a href="http://icu-project.org/apiref/icu4j/com/ibm/icu/text/SpoofChecker.html">http://icu-project.org/apiref/icu4j/com/ibm/icu/text/SpoofChecker.html</a> <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>And uspoof.h<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US><a href="http://icu-project.org/apiref/icu4c/uspoof_8h.html">http://icu-project.org/apiref/icu4c/uspoof_8h.html</a><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>This doesn’t forbid the Left To Right Override character that I can tell from simple examination, but that’s an easy check to add with a regex or character search.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Brad Hill<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Ecosystem Security<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>PayPal Information Risk Management<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>cell: 206.245.7844<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>skype/twitter: hillbrad<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>email: bhill@paypal-inc.com<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div></div></body></html>