Almost an year ago, idproxy.net announced it's approach to use the Yahoo! account as an OpenID. In simple words, you login to idproxy.net, with your Yahoo credentials and in return you get an OpenID [say, for example: prabath.idproxy.net].
idproxy.net also introduced different means of OpenID phishing resistance mechanisms.
With SafeSignIn, idproxy.net does not let RPs to redirect the user directly to the authentication page at the OpenID Provider[OP] end.Instead, once redirected to the OP, it displays the following.
The message reads, you need to first login to the OP, that is the idproxy.net, and then approve the request by the RP.
Well, with Yahoo! it self comming in to the OpenID business, role of idproxy.net is under threat.