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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Sounds like I’ll need to call into today’s IPP meeting to see how this will be resolved.<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>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Impact","sans-serif";color:navy">Peter Zehler</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><br>
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</span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:navy"><img width="113" height="54" id="Picture_x0020_1" src="cid:image001.png@01CF8955.630940D0" alt="parc"><br>
</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:navy">Email:
</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><a href="mailto:Peter.Zehler@Xerox.com"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Peter.Zehler@Xerox.com</span></a></span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><br>
</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:navy">Office: +1 (585) 265-8755<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:navy">Mobile: +1 (585) 329-9508</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><br>
</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:navy">FAX: +1 (585) 265-7441</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><br>
</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:navy">US Mail: Peter Zehler</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><br>
</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:navy">Palo Alto Research Center Incorporated</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><br>
</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:navy">800 Phillips Rd.</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><br>
</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:navy">M/S 128-25E</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><br>
</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:navy">Webster NY, 14580-9701</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">
</span><span style="color:#1F497D"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<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""> Michael Sweet [mailto:msweet@apple.com]
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<b>Sent:</b> Monday, June 16, 2014 11:20 AM<br>
<b>To:</b> Ira McDonald<br>
<b>Cc:</b> ipp@pwg.org; Zehler, Peter<br>
<b>Subject:</b> Re: [IPP] Fwd: IPP Scan operational attribute<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Ira,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Jun 16, 2014, at 11:02 AM, Ira McDonald <<a href="mailto:blueroofmusic@gmail.com">blueroofmusic@gmail.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Hi Mike,<o:p></o:p></p>
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<p class="MsoNormal">The reason for some sparse syntax was to support Pete's use case (over the phone)<o:p></o:p></p>
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<p class="MsoNormal">of wanting two or more credentials for the *same* destination (i.e., multi-factor auth is<o:p></o:p></p>
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<p class="MsoNormal">in use). This is a critically important real-world use case.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Then we need to define it and its requirements.<o:p></o:p></p>
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<p class="MsoNormal">With the straight parallel 1setOf approach, there has to be a nested collection to hold<br>
the auth-type, auth-data, etc. for each credential for one destination - ugly and fragile.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">If the auth type defines multiple credentials then those can be provided via separate data values in the 1setOf, or using type-specific member attributes. In short, we need to define what the attributes contain, not provide a BLOB holder
that will become an interoperability nightmare.<o:p></o:p></p>
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<p class="MsoNormal">Pete and I particularly liked the use of the simple (1setOf octetString(MAX)) with auto<br>
concatenation to support large credentials (X.509 certificates, etc.).<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">That is indeed a simple solution, but let's not make it an opaque blob.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-family:"Andale Mono","serif";color:black">_________________________________________________________<br>
Michael Sweet, Senior Printing System Engineer, PWG Chair<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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