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<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:navy'>I am not sure I have
understood Robert correctly but it seems obvious to me that if a site does not
want to reveal its origin it cannot apply for a tighter cooperation; it will
just be treated as any other site in the wild. And it is better not to
rely on the user agent to do the right thing if possible.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:navy'>Chris<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
whatwg-bounces@lists.whatwg.org [mailto:whatwg-bounces@lists.whatwg.org] <b><span
style='font-weight:bold'>On Behalf Of </span></b>Robert O'Callahan<br>
<b><span style='font-weight:bold'>Sent:</span></b> Monday, September 29, 2008
11:33 AM<br>
<b><span style='font-weight:bold'>To:</span></b> Hallvord R M Steen<br>
<b><span style='font-weight:bold'>Cc:</span></b> whatwg@lists.whatwg.org; Michal
Zalewski; Smylers<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [whatwg] Dealing with
UI redress vulnerabilities inherent tothe current web</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-US
style='font-size:12.0pt'>That's good to have and we should definitely do it,
but there are a couple of reasons "Same-Origin-Only-Unless-<o:p></o:p></span></font></p>
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<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>Access-Controls-Says-Otherwise"
would be useful as well:<br>
-- a bit simpler to implement on the server<br>
-- for privacy reasons some UAs in some situations might not want to expose the
origin to the IFRAME's server; allowing the origin check to happen on the
client would handle that<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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