How do I use SSL for OpenID transactions?
First, be aware that this only works in WordPress 2.6 and up. Make sure you’ve turned on SSL in WordPress by defining either of the following globals as “true” in your wp-config.php file: • FORCE_SSL_LOGIN • FORCE_SSL_ADMIN Then, also define the following global as “true” in your wp-config.php file: • OPENID_SSL Be aware that you will almost certainly have trouble with this if you are not using a certificate purchased from a well-known certificate authority.