<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">That looks good.<div><br></div><div>One question is if we want to also say the nonce value may be stored as part of the session state on the client (webserver). </div><div><br></div><div>Adding too many options may just confuse people though.</div><div><br></div><div>John B.</div><div><br></div><div><br><div><div>On Nov 13, 2013, at 11:38 AM, Brian Campbell <<a href="mailto:bcampbell@pingidentity.com">bcampbell@pingidentity.com</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div dir="ltr">"a random value
          as an HttpOnly a session cookie" -> remove the "a" after HttpOnly?<br></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Wed, Nov 13, 2013 at 11:35 AM, George Fletcher <span dir="ltr"><<a href="mailto:gffletch@aol.com" target="_blank">gffletch@aol.com</a>></span> wrote:<br>

<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
  
    
  
  <div bgcolor="#FFFFFF" text="#000000">
    <font face="Helvetica, Arial, sans-serif">I'll let John quibble over
      the specifics :) ... but it looks good to me.  Thanks, George<br>
      <br>
    </font><div><div class="h5">
    <div>On 11/13/13 1:30 PM, Mike Jones wrote:<br>
    </div>
    <blockquote type="cite">
      
      
      
      <div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Please
            review the new text at
            <a href="http://openid.bitbucket.org/openid-connect-core-1_0.html#NonceNotes" target="_blank">http://openid.bitbucket.org/openid-connect-core-1_0.html#NonceNotes</a>,
            which is where the implementation suggestions for the nonce
            parameter have been moved.<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">                                                           
            -- Mike<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><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"">
            <a href="mailto:openid-specs-ab-bounces@lists.openid.net" target="_blank">openid-specs-ab-bounces@lists.openid.net</a>
            [<a href="mailto:openid-specs-ab-bounces@lists.openid.net" target="_blank">mailto:openid-specs-ab-bounces@lists.openid.net</a>]
            <b>On Behalf Of </b>Brian Campbell<br>
            <b>Sent:</b> Wednesday, October 30, 2013 9:00 AM<br>
            <b>To:</b> John Bradley<br>
            <b>Cc:</b> <a href="mailto:openid-specs-ab@lists.openid.net" target="_blank">openid-specs-ab@lists.openid.net</a><br>
            <b>Subject:</b> Re: [Openid-specs-ab] Nonce value suggestion
            for the Implicit Flow<u></u><u></u></span></p><p class="MsoNormal"><u></u> <u></u></p>
        <div><p class="MsoNormal">The nonce is a different approach to
            protecting against things like replay prevention but doesn't
            have the same scaling implications as tracking token ids.
            Which is nice.<u></u><u></u></p>
        </div>
        <div><p class="MsoNormal" style="margin-bottom:12.0pt"><u></u> <u></u></p>
          <div><p class="MsoNormal">On Wed, Oct 30, 2013 at 4:13 AM, John
              Bradley <<a href="mailto:ve7jtb@ve7jtb.com" target="_blank">ve7jtb@ve7jtb.com</a>>
              wrote:<u></u><u></u></p>
            <div><p class="MsoNormal">The nonce is opaque to the AS, it is
                sent by the client and validated by the client.   It
                binds the signed id_token to something in the user's
                browser session.   This is critical to prevent attacks
                on the implicit flow, where the redirect_uri is not sent
                to the token endpoint for validation.  It is not
                required for the "code" flow.  In the hybrid flows  it
                needs to be used to validate the id_token presented in
                the front channel as well, as  the client may be using
                the id_token before exchanging code at the token
                endpoint, and discovering an attack.<u></u><u></u></p>
              <div><p class="MsoNormal"><u></u> <u></u></p>
              </div>
              <div><p class="MsoNormal">I think it also prevents some
                  attacks against code interception that checking the
                  redirect_uri wouldn't so in a high loa deployment I
                  would check both nonce and the redirect_uri.<u></u><u></u></p>
                <div><p class="MsoNormal"><u></u> <u></u></p>
                </div>
                <div><p class="MsoNormal">Are you asking about "jti" in the
                    assertion used to authenticate the client to the
                    token endpoint?<u></u><u></u></p>
                </div>
                <div>
                  <div>
                    <div><p class="MsoNormal"><u></u> <u></u></p>
                      <div>
                        <div><p class="MsoNormal">On Oct 30, 2013, at 1:44
                            AM, Anthony Nadalin <<a href="mailto:tonynad@microsoft.com" target="_blank">tonynad@microsoft.com</a>>
                            wrote:<u></u><u></u></p>
                        </div><p class="MsoNormal"><br>
                          <br>
                          <u></u><u></u></p>
                        <div>
                          <div>
                            <div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">I’m
                                  not seeing how you are dealing with
                                  duplicate nonces as this can be a
                                  scaling issue when dealing with
                                  millions of requests, the nonces need
                                  better advice</span><u></u><u></u></p>
                            </div>
                            <div><p class="MsoNormal"><a name="14252bf9530978a2_14208dc46cdfd917__MailEndCompose"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></a><u></u><u></u></p>


                            </div>
                            <div>
                              <div style="border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in 0in 0in">
                                <div><p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> <a href="mailto:openid-specs-ab-bounces@lists.openid.net" target="_blank">openid-specs-ab-bounces@lists.openid.net</a>
                                      [<a href="mailto:openid-specs-ab-bounces@lists.openid.net" target="_blank">mailto:openid-specs-ab-bounces@lists.openid.net</a>] <b>On
                                        Behalf Of </b>John Bradley<br>
                                      <b>Sent:</b> Tuesday, October 29,
                                      2013 7:33 PM<br>
                                      <b>To:</b> Mike Jones<br>
                                      <b>Cc:</b> <a href="mailto:openid-specs-ab@lists.openid.net" target="_blank">openid-specs-ab@lists.openid.net</a><br>
                                      <b>Subject:</b> Re:
                                      [Openid-specs-ab] Nonce value
                                      suggestion for the Implicit Flow</span><u></u><u></u></p>
                                </div>
                              </div>
                            </div>
                            <div><p class="MsoNormal"> <u></u><u></u></p>
                            </div>
                            <div><p class="MsoNormal">You want to store the
                                random value and send the hash.   Saving
                                the hash is not secure unless it is
                                signed. <u></u><u></u></p>
                            </div>
                            <div>
                              <div><p class="MsoNormal"> <u></u><u></u></p>
                              </div>
                            </div>
                            <div>
                              <div><p class="MsoNormal">The idea is to
                                  force an attacker to compute a
                                  plaintext for the hash (hard to
                                  impossible depending on length) in
                                  order to be able to present the
                                  response from the AS.<u></u><u></u></p>
                              </div>
                            </div>
                            <div>
                              <div><p class="MsoNormal"> <u></u><u></u></p>
                              </div>
                            </div>
                            <div>
                              <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
                                <div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">For
                                      case 1:  The Client can generate a
                                      random value with sufficient
                                      entropy and store that value in
                                      local storage.  This value is then
                                      hashed to produce a nonce value.
                                      The hashed value  could optionally
                                      be truncated to a sufficient
                                      number of bits (such as 128)
                                      before use. </span><u></u><u></u></p>
                                </div>
                              </blockquote>
                              <div>
                                <div>
                                  <div><p class="MsoNormal">On Oct 29,
                                      2013, at 9:40 PM, Mike Jones <<a href="mailto:Michael.Jones@microsoft.com" target="_blank"><span style="color:purple">Michael.Jones@microsoft.com</span></a>>
                                      wrote:<u></u><u></u></p>
                                  </div>
                                </div>
                                <div><p class="MsoNormal" style="margin-bottom:12.0pt"><u></u> <u></u></p>
                                </div>
                                <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
                                  <div>
                                    <div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Here’s
                                          an attempt at simplifying
                                          George’s text.</span><u></u><u></u></p>
                                    </div>
                                  </div>
                                  <div>
                                    <div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">For
                                          case 1:  The Client can
                                          generate a random value with
                                          sufficient entropy and store a
                                          cryptographic hash (such as
                                          SHA-256) of that value in
                                          local storage.  The hashed
                                          value could optionally be
                                          truncated to a sufficient
                                          number of bits (such as 128)
                                          before use.  The stored value
                                          is used as the nonce value.</span><u></u><u></u></p>
                                    </div>
                                  </div>
                                  <div>
                                    <div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">For
                                          case 2:  The Client can
                                          generate a random value with
                                          sufficient entropy and store
                                          that value as an HttpOnly
                                          session cookie.  A
                                          cryptographic hash (such as
                                          SHA-256) of the cookie value
                                          (or a truncation of the hash
                                          value to a sufficient number
                                          of bits) is used as the nonce
                                          value.</span><u></u><u></u></p>
                                    </div>
                                  </div>
                                  <div>
                                    <div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p>
                                    </div>
                                  </div>
                                  <div>
                                    <div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Am
                                          I correct that the
                                          cryptographic hash function is
                                          used to spread the entropy
                                          present in the random value
                                          generated throughout the nonce
                                          value in both cases?</span><u></u><u></u></p>
                                    </div>
                                  </div>
                                  <div>
                                    <div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p>
                                    </div>
                                  </div>
                                  <div>
                                    <div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Comments?</span><u></u><u></u></p>
                                    </div>
                                  </div>
                                  <div>
                                    <div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p>
                                    </div>
                                  </div>
                                  <div>
                                    <div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">                                                               
                                          -- Mike</span><u></u><u></u></p>
                                    </div>
                                  </div>
                                  <div>
                                    <div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p>
                                    </div>
                                  </div>
                                  <div>
                                    <div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in 0in 0in">
                                      <div><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""> Richer,
                                            Justin P. [<a href="mailto:jricher@mitre.org" target="_blank"><span style="color:purple">mailto:jricher@mitre.org</span></a>] <br>
                                            <b>Sent:</b> Saturday,
                                            October 26, 2013 11:33 AM<br>
                                            <b>To:</b> George Fletcher<br>
                                            <b>Cc:</b> John Bradley;
                                            Mike Jones; <a href="mailto:openid-specs-ab@lists.openid.net" target="_blank"><span style="color:purple">openid-specs-ab@lists.openid.net</span></a><br>
                                            <b>Subject:</b> Re:
                                            [Openid-specs-ab] Nonce
                                            value suggestion for the
                                            Implicit Flow</span><u></u><u></u></p>
                                      </div>
                                    </div>
                                  </div>
                                  <div>
                                    <div><p class="MsoNormal"> <u></u><u></u></p>
                                    </div>
                                  </div>
                                  <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
                                    <div><p class="MsoNormal"><span style="font-family:"Helvetica","sans-serif"">I
                                          don't know where the best
                                          place is to provide this
                                          guidance. If we have a
                                          "validating the ID Token"
                                          sub-section in the new ID
                                          Token section, then maybe it
                                          would best fit there.</span><u></u><u></u></p>
                                    </div>
                                  </blockquote>
                                  <div>
                                    <div><p class="MsoNormal"> <u></u><u></u></p>
                                    </div>
                                  </div>
                                  <div>
                                    <div><p class="MsoNormal">+1 to this
                                        idea with a cross link from the
                                        nonce definition.<u></u><u></u></p>
                                    </div>
                                  </div>
                                  <div>
                                    <div><p class="MsoNormal"> <u></u><u></u></p>
                                    </div>
                                  </div>
                                  <div>
                                    <div><p class="MsoNormal"> -- Justin<u></u><u></u></p>
                                    </div>
                                  </div>
                                  <div>
                                    <div><p class="MsoNormal"> <u></u><u></u></p>
                                    </div>
                                  </div>
                                  <div>
                                    <div><p class="MsoNormal"> <u></u><u></u></p>
                                    </div>
                                  </div>
                                  <div>
                                    <div>
                                      <div><p class="MsoNormal">On Oct 25,
                                          2013, at 6:17 AM, George
                                          Fletcher <<a href="mailto:gffletch@aol.com" target="_blank"><span style="color:purple">gffletch@aol.com</span></a>>
                                          wrote:<u></u><u></u></p>
                                      </div>
                                    </div>
                                    <div>
                                      <div><p class="MsoNormal" style="margin-bottom:12.0pt"><br>
                                          <br>
                                          <u></u><u></u></p>
                                      </div>
                                    </div>
                                    <div><p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-family:"Helvetica","sans-serif"">If we
                                          are going to give guidance,
                                          then we really need to give
                                          guidance for two different use
                                          cases...<br>
                                          <br>
                                          1. The "client" will validate
                                          the response locally in the
                                          browser<br>
                                          2. The "client" will validate
                                          the response at it's server
                                          (even though it's using the
                                          implicit flow)<br>
                                          <br>
                                          For use case 1: One method to
                                          achieve this is for the client
                                          to generate a random string
                                          with sufficient entropy and
                                          store a SHA-1 hash of the
                                          string in local storage. Then
                                          use the SHA-1 hash of the
                                          random string as the value of
                                          the nonce parameter. To
                                          validate the nonce on receipt
                                          of the ID Token, extract the
                                          nonce from the ID Token and
                                          compare it to the stored SHA-1
                                          hash in local storage.<br>
                                          <br>
                                          For use case 2: One method to
                                          achieve this is for the
                                          backend server to use a SHA-1
                                          hash of the "clients"
                                          protected session cookie as
                                          the value of the nonce
                                          parameter when constructing
                                          the AuthorizationRequest. Note
                                          that the Session cookie SHOULD
                                          be protected (restricted to
                                          SSL and not readable by
                                          JavaScript) for this method.
                                          To validate the ID Token at
                                          the server, the server
                                          calculates a SHA-1 hash of the
                                          Session cookie value and
                                          compares that to the nonce
                                          value in the ID Token.<br>
                                          <br>
                                          I don't know where the best
                                          place is to provide this
                                          guidance. If we have a
                                          "validating the ID Token"
                                          sub-section in the new ID
                                          Token section, then maybe it
                                          would best fit there.<br>
                                          <br>
                                          Thanks,<br>
                                          George</span><u></u><u></u></p>
                                      <div>
                                        <div><p class="MsoNormal">On
                                            10/24/13 7:16 PM, John
                                            Bradley wrote:<u></u><u></u></p>
                                        </div>
                                      </div>
                                      <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
                                        <div>
                                          <div><p class="MsoNormal">We want
                                              the implicit flow to
                                              validate nonce,  it would
                                              be better to have some
                                              reasonable advice for
                                              using HTML local storage
                                              rather than session
                                              cookies.<u></u><u></u></p>
                                          </div>
                                        </div>
                                        <div>
                                          <div>
                                            <div><p class="MsoNormal"> <u></u><u></u></p>
                                            </div>
                                          </div>
                                          <div>
                                            <div>
                                              <div><p class="MsoNormal">On
                                                  2013-10-24, at 3:44
                                                  PM, Mike Jones <<a href="mailto:Michael.Jones@microsoft.com" target="_blank"><span style="color:purple">Michael.Jones@microsoft.com</span></a>> wrote:<u></u><u></u></p>


                                              </div>
                                            </div>
                                            <div>
                                              <div><p class="MsoNormal" style="margin-bottom:12.0pt"><br>
                                                  <br>
                                                  <u></u><u></u></p>
                                              </div>
                                            </div>
                                            <div>
                                              <div>
                                                <div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">We
                                                      could drop it from
                                                      the Implicit Flow,
                                                      as it’s already
                                                      present in the
                                                      Code Flow.  Does
                                                      that work for
                                                      people?</span><u></u><u></u></p>
                                                </div>
                                              </div>
                                              <div>
                                                <div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p>
                                                </div>
                                              </div>
                                              <div>
                                                <div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">                                                           
                                                      -- Mike</span><u></u><u></u></p>
                                                </div>
                                              </div>
                                              <div>
                                                <div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p>
                                                </div>
                                              </div>
                                              <div>
                                                <div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in 0in 0in">
                                                  <div><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""> Richer,
                                                        Justin P. [<a href="mailto:jricher@" target="_blank"><span style="color:purple">mailto:jricher@</span></a><a href="http://mitre.org/" target="_blank"><span style="color:purple">mitre.org</span></a>] <br>


                                                        <b>Sent:</b> Thursday,
                                                        October 24, 2013
                                                        12:56 PM<br>
                                                        <b>To:</b> Mike
                                                        Jones<br>
                                                        <b>Cc:</b> <a href="mailto:openid-specs-ab@lists.openid.net" target="_blank"><span style="color:purple">openid-specs-ab@lists.openid.net</span></a><br>
                                                        <b>Subject:</b> Re:
                                                        [Openid-specs-ab]
                                                        Nonce value
                                                        suggestion for
                                                        the Implicit
                                                        Flow</span><u></u><u></u></p>
                                                  </div>
                                                </div>
                                              </div>
                                              <div>
                                                <div><p class="MsoNormal"> <u></u><u></u></p>
                                                </div>
                                              </div>
                                              <div>
                                                <div><p class="MsoNormal">I'm
                                                    actually in favor of
                                                    dropping this
                                                    example, or else
                                                    providing it in a
                                                    list of
                                                    alternatives. The
                                                    important thing is
                                                    that the client can
                                                    validate the exact
                                                    value of the nonce
                                                    parameter on its way
                                                    back through, the
                                                    mechanics of how
                                                    that happens are
                                                    client specific (but
                                                    we can provide
                                                    simple guidance).<u></u><u></u></p>
                                                </div>
                                              </div>
                                              <div>
                                                <div>
                                                  <div><p class="MsoNormal"> <u></u><u></u></p>
                                                  </div>
                                                </div>
                                                <div>
                                                  <div><p class="MsoNormal"> --
                                                      Justin<u></u><u></u></p>
                                                  </div>
                                                </div>
                                                <div>
                                                  <div>
                                                    <div><p class="MsoNormal"> <u></u><u></u></p>
                                                    </div>
                                                  </div>
                                                  <div>
                                                    <div>
                                                      <div><p class="MsoNormal">On
                                                          Oct 24, 2013,
                                                          at 11:44 AM,
                                                          Mike Jones
                                                          <<a href="mailto:Michael.Jones@microsoft.com" target="_blank"><span style="color:purple">Michael.Jones@microsoft.com</span></a>><u></u><u></u></p>
                                                      </div>
                                                    </div>
                                                    <div>
                                                      <div><p class="MsoNormal"> wrote:<u></u><u></u></p>
                                                      </div>
                                                    </div>
                                                    <div>
                                                      <div><p class="MsoNormal" style="margin-bottom:12.0pt"><br>
                                                          <br>
                                                          <br>
                                                          <u></u><u></u></p>
                                                      </div>
                                                    </div>
                                                    <div>
                                                      <div>
                                                        <div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">For
                                                          the Implicit
                                                          Flow, the
                                                          “nonce”
                                                          description
                                                          contains this
                                                          text at<a href="http://openid.bitbucket.org/openid-connect-core-1_0.html#ImplicitAuthorizationRequest" target="_blank"><span style="color:purple">http://openid.bitbucket.org/openid-connect-core-1_0.html#ImplicitAuthorizationRequest</span></a>:</span><u></u><u></u></p>


                                                        </div>
                                                      </div>
                                                      <div style="margin-left:.5in">
                                                        <div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Verdana","sans-serif"" lang="EN">Sufficient
                                                          entropy MUST
                                                          be present in
                                                          the </span><tt><span style="font-size:10.0pt;color:#003366" lang="EN">nonce</span></tt><span style="font-size:11.0pt;font-family:"Verdana","sans-serif"" lang="EN"> values

                                                          used to
                                                          prevent
                                                          attackers from
                                                          guessing
                                                          values. <span style="background:yellow">One method to achieve this is to store a
                                                          random value
                                                          as a signed
                                                          session
                                                          cookie, and
                                                          pass the value
                                                          in the</span></span><tt><span style="font-size:10.0pt;color:#003366;background:yellow" lang="EN">nonce</span></tt><span style="font-size:11.0pt;font-family:"Verdana","sans-serif";background:yellow" lang="EN"> parameter.

                                                          In that case,
                                                          the </span><tt><span style="font-size:10.0pt;color:#003366;background:yellow" lang="EN">nonce</span></tt><span style="font-size:11.0pt;font-family:"Verdana","sans-serif";background:yellow" lang="EN"> in
                                                          the returned
                                                          ID Token can
                                                          be compared to
                                                          the signed
                                                          session cookie
                                                          to detect ID
                                                          Token replay
                                                          by third
                                                          parties.</span><u></u><u></u></p>
                                                        </div>
                                                      </div>
                                                      <div>
                                                        <div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><u></u><u></u></p>
                                                        </div>
                                                      </div>
                                                      <div>
                                                        <div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">George
                                                          wrote this
                                                          about the
                                                          suggestion in
                                                          his review:</span><u></u><u></u></p>
                                                        </div>
                                                      </div>
                                                      <div style="margin-left:.5in">
                                                        <div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">“I'm
                                                          not sure this
                                                          suggestion
                                                          makes sense
                                                          for the
                                                          implicit flow.
                                                          The client
                                                          would need to
                                                          write a cookie
                                                          value on the
                                                          domain of the
                                                          redirect_uri
                                                          and the
                                                          attempt to
                                                          read it on the
                                                          return of the
                                                          implicit flow.
                                                          Wondering if a
                                                          local storage
                                                          example would
                                                          make more
                                                          sense.”</span><u></u><u></u></p>
                                                        </div>
                                                      </div>
                                                      <div>
                                                        <div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><u></u><u></u></p>
                                                        </div>
                                                      </div>
                                                      <div>
                                                        <div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Do
                                                          people agree
                                                          with him?  If
                                                          so, does
                                                          someone want
                                                          to supply
                                                          specific
                                                          alternative
                                                          text to use?</span><u></u><u></u></p>
                                                        </div>
                                                      </div>
                                                      <div>
                                                        <div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><u></u><u></u></p>
                                                        </div>
                                                      </div>
                                                      <div>
                                                        <div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">                                                           
                                                          -- Mike</span><u></u><u></u></p>
                                                        </div>
                                                      </div>
                                                      <div>
                                                        <div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><u></u><u></u></p>
                                                        </div>
                                                      </div>
                                                      <div>
                                                        <div><p class="MsoNormal"><span style="font-size:13.5pt;font-family:"Helvetica","sans-serif"">_______________________________________________<br>
                                                          Openid-specs-ab
                                                          mailing list<br>
                                                          <a href="mailto:Openid-specs-ab@lists.openid.net" target="_blank"><span style="color:purple">Openid-specs-ab@lists.openid.net</span></a><br>
                                                          <a href="http://lists.openid.net/mailman/listinfo/openid-specs-ab" target="_blank"><span style="color:purple">http://lists.openid.net/mailman/listinfo/openid-specs-ab</span></a></span><u></u><u></u></p>


                                                        </div>
                                                      </div>
                                                    </div>
                                                  </div>
                                                  <div>
                                                    <div><p class="MsoNormal"> <u></u><u></u></p>
                                                    </div>
                                                  </div>
                                                </div>
                                              </div>
                                              <div>
                                                <div><p class="MsoNormal"><span style="font-size:13.5pt;font-family:"Helvetica","sans-serif"">_______________________________________________<br>
                                                      Openid-specs-ab
                                                      mailing list<br>
                                                      <a href="mailto:Openid-specs-ab@lists.openid.net" target="_blank"><span style="color:purple">Openid-specs-ab@lists.openid.net</span></a><br>
                                                      <a href="http://lists.openid.net/mailman/listinfo/openid-specs-ab" target="_blank"><span style="color:purple">http://lists.openid.net/mailman/listinfo/openid-specs-ab</span></a></span><u></u><u></u></p>


                                                </div>
                                              </div>
                                            </div>
                                          </div>
                                          <div>
                                            <div><p class="MsoNormal"> <u></u><u></u></p>
                                            </div>
                                          </div>
                                        </div>
                                        <div>
                                          <div><p class="MsoNormal" style="margin-bottom:12.0pt"><br>
                                              <br>
                                              <br>
                                              <u></u><u></u></p>
                                          </div>
                                        </div>
                                        <pre>_______________________________________________<u></u><u></u></pre>
                                        <pre><u></u> <u></u></pre>
                                        <pre><u></u> <u></u></pre>
                                        <pre>Openid-specs-ab mailing list<u></u><u></u></pre>
                                        <pre><a href="mailto:Openid-specs-ab@lists.openid.net" target="_blank"><span style="color:purple">Openid-specs-ab@lists.openid.net</span></a><u></u><u></u></pre>
                                        <pre><a href="http://lists.openid.net/mailman/listinfo/openid-specs-ab" target="_blank"><span style="color:purple">http://lists.openid.net/mailman/listinfo/openid-specs-ab</span></a><u></u><u></u></pre>


                                      </blockquote>
                                      <div>
                                        <div><p class="MsoNormal"> <u></u><u></u></p>
                                        </div>
                                      </div>
                                      <div>
                                        <div><p class="MsoNormal">-- <br>
                                            <a href="http://connect.me/gffletch" title="View full card on
                                              Connect.Me" target="_blank"><span style="color:purple"><XeC.png></span></a><u></u><u></u></p>
                                        </div>
                                      </div>
                                    </div>
                                    <div>
                                      <div><p class="MsoNormal">_______________________________________________<br>
                                          Openid-specs-ab mailing list<br>
                                          <a href="mailto:Openid-specs-ab@lists.openid.net" target="_blank"><span style="color:purple">Openid-specs-ab@lists.openid.net</span></a><br>
                                          <a href="http://lists.openid.net/mailman/listinfo/openid-specs-ab" target="_blank"><span style="color:purple">http://lists.openid.net/mailman/listinfo/openid-specs-ab</span></a><u></u><u></u></p>


                                      </div>
                                    </div>
                                  </div>
                                </blockquote>
                              </div>
                            </div>
                          </div>
                        </div>
                      </div><p class="MsoNormal"><u></u> <u></u></p>
                    </div>
                  </div>
                </div>
              </div>
            </div><p class="MsoNormal" style="margin-bottom:12.0pt"><br>
              _______________________________________________<br>
              Openid-specs-ab mailing list<br>
              <a href="mailto:Openid-specs-ab@lists.openid.net" target="_blank">Openid-specs-ab@lists.openid.net</a><br>
              <a href="http://lists.openid.net/mailman/listinfo/openid-specs-ab" target="_blank">http://lists.openid.net/mailman/listinfo/openid-specs-ab</a><u></u><u></u></p>
          </div><p class="MsoNormal"><u></u> <u></u></p>
        </div>
      </div>
      <br>
      <fieldset></fieldset>
      <br>
      <pre>_______________________________________________
Openid-specs-ab mailing list
<a href="mailto:Openid-specs-ab@lists.openid.net" target="_blank">Openid-specs-ab@lists.openid.net</a>
<a href="http://lists.openid.net/mailman/listinfo/openid-specs-ab" target="_blank">http://lists.openid.net/mailman/listinfo/openid-specs-ab</a>
</pre>
    </blockquote>
    <br>
    </div></div><span class="HOEnZb"><font color="#888888"><div>-- <br>
      <a href="http://connect.me/gffletch" title="View full card on
        Connect.Me" target="_blank"><span><XeC.png></span></a></div>
  </font></span></div>

</blockquote></div><br></div>
</blockquote></div><br></div></body></html>