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<div>But…</div>
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<div>The objective of the binding_message is to interlock both devices in other scenarios different from a simple authentication. In fact, as far as I know the original request came from the banks that wanted show information related with transactions, etc…</div>
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<span style="font-weight:bold">From: </span>"<a href="mailto:Torsten.Lodderstedt@telekom.de">Torsten.Lodderstedt@telekom.de</a>"<br>
<span style="font-weight:bold">Date: </span>Wednesday 30 November 2016 at 17:43<br>
<span style="font-weight:bold">To: </span>Gonzalo Fernández, "<a href="mailto:Axel.Nennker@telekom.de">Axel.Nennker@telekom.de</a>", "<a href="mailto:openid-specs-mobile-profile@lists.openid.net">openid-specs-mobile-profile@lists.openid.net</a>"<br>
<span style="font-weight:bold">Subject: </span>AW: [Openid-specs-mobile-profile] OP generated binding_message<br>
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<p class="MsoNormal"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">In the context of an authentication process, the OP definitely knows what to display on the authentication device, e.g. information about
the service the user is supposed to login to.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size: 10pt; font-family: Tahoma, sans-serif; color: windowtext;">Von:</span></b><span style="font-size: 10pt; font-family: Tahoma, sans-serif; color: windowtext;"> Openid-specs-mobile-profile [<a href="mailto:openid-specs-mobile-profile-bounces@lists.openid.net">mailto:openid-specs-mobile-profile-bounces@lists.openid.net</a>]
<b>Im Auftrag von </b>GONZALO FERNANDEZ RODRIGUEZ<br>
<b>Gesendet:</b> Mittwoch, 30. November 2016 15:27<br>
<b>An:</b> Nennker, Axel; <a href="mailto:openid-specs-mobile-profile@lists.openid.net">
openid-specs-mobile-profile@lists.openid.net</a><br>
<b>Betreff:</b> Re: [Openid-specs-mobile-profile] OP generated binding_message<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size: 10.5pt; font-family: Calibri, sans-serif;">Sorry Axel,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size: 10.5pt; font-family: Calibri, sans-serif;"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size: 10.5pt; font-family: Calibri, sans-serif;">I don’t agree with this approach, the OP knows better “HOW” to show the information in the Authentication device because it knows de limits of the authenticator, however
I reckon that is the RP who knows better “WHAT” should be displayed. What I mean is that if the OP takes a decision to optimise what should be displayed it can truncate it and exclude what is important.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size: 10.5pt; font-family: Calibri, sans-serif;"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size: 10.5pt; font-family: Calibri, sans-serif;">Best,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size: 10.5pt; font-family: Calibri, sans-serif;">Gonza.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size: 10.5pt; font-family: Calibri, sans-serif;"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="mso-outline-level:1"><b><span style="font-family: Calibri, sans-serif;">From:
</span></b><span style="font-family: Calibri, sans-serif;">Openid-specs-mobile-profile on behalf of "<a href="mailto:Axel.Nennker@telekom.de">Axel.Nennker@telekom.de</a>"<br>
<b>Date: </b>Wednesday 30 November 2016 at 14:53<br>
<b>To: </b>"<a href="mailto:openid-specs-mobile-profile@lists.openid.net">openid-specs-mobile-profile@lists.openid.net</a>"<br>
<b>Subject: </b>[Openid-specs-mobile-profile] OP generated binding_message<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size: 10.5pt; font-family: Calibri, sans-serif;"><o:p> </o:p></span></p>
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<p class="MsoPlainText"><span lang="EN-US" style="color:black;mso-ansi-language:EN-US">I an email to GSMA I suggested to discuss whether it is worthwhile reversing the direction of binding_message.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US" style="color:black;mso-ansi-language:EN-US"> <o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US" style="color:black;mso-ansi-language:EN-US">The reasoning is:<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US" style="color:black;mso-ansi-language:EN-US"> <o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US" style="color:black;mso-ansi-language:EN-US">I think that the OP knows better what the AD can display.
<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US" style="color:black;mso-ansi-language:EN-US"> <o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US" style="color:black;mso-ansi-language:EN-US">After receiving the CIBA request the OP determines the channel and AD capabilities (like USSD and SIM Toolkit) and sends the binding_message to the AD and the RP in the CIBA
Authentication Request Response.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US" style="color:black;mso-ansi-language:EN-US"> <o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US" style="color:black;mso-ansi-language:EN-US">The same suggestion was raised by Arne during a GSMA CPAS call this morning.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US" style="color:black;mso-ansi-language:EN-US"> <o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US" style="color:black;mso-ansi-language:EN-US">// Axel<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US" style="color:black;mso-ansi-language:EN-US"> <o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US" style="color:black;mso-ansi-language:EN-US">Here some use case describing this<o:p></o:p></span></p>
<p class="MsoPlainText" style="margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo2">
<!--[if !supportLists]--><span lang="EN-US" style="mso-fareast-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;mso-ansi-language:EN-US"><span style="mso-list:Ignore">-<span style="font-style: normal; font-variant-caps: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';">
</span></span></span><!--[endif]--><span lang="EN-US" style="color:black;mso-ansi-language:EN-US">Polish policeman (PP) wants to check driver’s license which the driver has not present<o:p></o:p></span></p>
<p class="MsoPlainText" style="margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo2">
<!--[if !supportLists]--><span lang="EN-US" style="mso-fareast-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;mso-ansi-language:EN-US"><span style="mso-list:Ignore">-<span style="font-style: normal; font-variant-caps: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';">
</span></span></span><!--[endif]--><span lang="EN-US" style="color:black;mso-ansi-language:EN-US">PP logs into government website (RP) and enters drivers mobile number<o:p></o:p></span></p>
<p class="MsoPlainText" style="margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo2">
<!--[if !supportLists]--><span lang="EN-US" style="mso-fareast-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;mso-ansi-language:EN-US"><span style="mso-list:Ignore">-<span style="font-style: normal; font-variant-caps: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';">
</span></span></span><!--[endif]--><span lang="EN-US" style="color:black;mso-ansi-language:EN-US">RP sends CIBA to OP which sends request to AD binding_message=”PP Szydło wants to check your driver’s license”<o:p></o:p></span></p>
<p class="MsoPlainText" style="margin-left:36.0pt"><span lang="EN-US" style="color:black;mso-ansi-language:EN-US">OP sends binding_message to RP which is shown to PP too.<o:p></o:p></span></p>
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<!--[if !supportLists]--><span lang="EN-US" style="mso-fareast-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;mso-ansi-language:EN-US"><span style="mso-list:Ignore">-<span style="font-style: normal; font-variant-caps: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';">
</span></span></span><!--[endif]--><span lang="EN-US" style="color:black;mso-ansi-language:EN-US">User sees message “PP Szydło wants to check your driver’s license”, checks Name PP’s device and consents
<o:p></o:p></span></p>
<p class="MsoPlainText" style="margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo2">
<!--[if !supportLists]--><span lang="EN-US" style="mso-fareast-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;mso-ansi-language:EN-US"><span style="mso-list:Ignore">-<span style="font-style: normal; font-variant-caps: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';">
</span></span></span><!--[endif]--><span lang="EN-US" style="color:black;mso-ansi-language:EN-US">OP notifies RP of consent<o:p></o:p></span></p>
<p class="MsoPlainText" style="margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo2">
<!--[if !supportLists]--><span lang="EN-US" style="mso-fareast-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;mso-ansi-language:EN-US"><span style="mso-list:Ignore">-<span style="font-style: normal; font-variant-caps: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';">
</span></span></span><!--[endif]--><span lang="EN-US" style="color:black;mso-ansi-language:EN-US">RP retrieves driver’s picture and validity data of licence from its DB<o:p></o:p></span></p>
<p class="MsoPlainText" style="margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo2">
<!--[if !supportLists]--><span lang="EN-US" style="mso-fareast-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;mso-ansi-language:EN-US"><span style="mso-list:Ignore">-<span style="font-style: normal; font-variant-caps: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';">
</span></span></span><!--[endif]--><span lang="EN-US" style="color:black;mso-ansi-language:EN-US">RP sends data to PP who compares the picture and now knows the validity of the driver’s license without giving away too much data<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US" style="color:black;mso-ansi-language:EN-US"> <o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US" style="color:black;mso-ansi-language:EN-US"> <o:p></o:p></span></p>
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