The author raises many important issues for consumer oriented websites that are trying to accept 3rd party logins, and I think we as a community should listen and take the author's feedback very seriously.<div><br></div>
<div>Specially:</div><div><br></div><div>1) Directed Identity / PPID (Pairwise Pseudonmous identifier) / non-correlatible RP specific identifier - is great in theory, but does not provide enough value to most RPs to justify implementing OpenID. PPID identifiers have no history, no data, and no reputation - why would any RP want this? Also, as the author pointed out, changing the PPID based on the realm/return_to means that RPs will "lose all their users" if they ever switch their domain/realm. There are many valid reasons why RPs would want to have multiple realms/domains, or to change them around.</div>
<div><br></div><div>2) username@provider identifiers are necessary for users to contact the RP via customer support and other out of band mechanisms. For all practical purposes, the email address is really required.</div>
<div><br></div><div>3) We often talk about OpenID's value to end users, but we don't talk enough about giving value to RPs. The main hurdle to OpenID adoption is that RPs don't see enough value in OpenID, especially relative to other proprietary alternatives. </div>
<div><br></div><div>For a really harsh critique of OpenID, I highly recommend reading Yishan Wong's (ex Facebook/Paypal) tirade against OpenID on Quora:</div><div><br></div><div><a href="http://www.quora.com/What-s-wrong-with-OpenID">http://www.quora.com/What-s-wrong-with-OpenID</a></div>
<div><br></div><div>Allen</div><div><br></div><div><br></div><div><br></div><div><div class="gmail_quote">On Wed, Nov 17, 2010 at 4:01 PM, Bill Shupp <span dir="ltr"><<a href="mailto:hostmaster@shupp.org">hostmaster@shupp.org</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><a href="http://blog.wekeroad.com/thoughts/open-id-is-a-party-that-happened" target="_blank">http://blog.wekeroad.com/thoughts/open-id-is-a-party-that-happened</a><br>
<br></blockquote></div><br></div>