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Sounds like it could be interpreted as that. However, SP lazy session initiation can be described the same way.
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<div>Dave<br>
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<div>David Langenberg</div>
<div>Identity & Access Management</div>
<div>The University of Chicago</div>
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<div>On Feb 19, 2013, at 2:52 PM, David Bantz <<a href="mailto:dabantz@alaska.edu">dabantz@alaska.edu</a>></div>
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<div class="column">A potential vendor's documentation describes their support for SSO and SAML as follows:</div>
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<p><span style="font-size: 10.000000pt; font-family: 'Arial,Bold'">SAML Authentication:
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<p><span style="font-size: 10pt; ">User initiates the request via a link </span></p>
</li><li style="font-size: 10.000000pt; font-family: 'Arial'">
<p><span style="font-size: 10pt; ">Client’s server intercepts and generates SSO assertion
</span></p>
</li><li style="font-size: 10.000000pt; font-family: 'Arial'">
<p><span style="font-size: 10pt; ">SAML assertion is posted to SSO URL by the browser
</span></p>
</li><li style="font-size: 10.000000pt; font-family: 'Arial'">
<p><span style="font-size: 10pt; ">Signature, timestamp, and recipient are posted
</span></p>
</li><li style="font-size: 10.000000pt; font-family: 'Arial'">
<p><span style="font-size: 10pt; ">Payload is examined for destinations </span></p>
</li><li style="font-size: 10.000000pt; font-family: 'Arial'">
<p><span style="font-size: 10pt; ">User looked-up, must be active </span></p>
</li><li style="font-size: 10.000000pt; font-family: 'Arial'">
<p><span style="font-size: 10pt; ">User logged-in and redirected to destination (login page or deep link) </span></p>
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Do I correctly infer they are supporting only unsolicited or "idp initiated" SSO?</div>
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<div class="column">What caveats (if any) should I relay to the prospective service owner(s)?</div>
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<div class="column">I've read <a href="https://wiki.shibboleth.net/confluence/display/SHIB2/IdPUnsolicitedSSO">https://wiki.shibboleth.net/confluence/display/SHIB2/IdPUnsolicitedSSO</a></div>
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<div class="column">Thanks for any pointers,</div>
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<div class="column">David Bantz</div>
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