Your initial concerns are addressed by openid "personas". myopenid.com has them implemented and is free (or you could set up your own server to achieve it). ht

Your initial concerns are addressed by openid "personas". myopenid.com has them implemented and is free (or you could set up your own server to achieve it). https://www.myopenid.com/help#personas https://www.myopenid.com/help#personas Your later concerns are solved by openid delegation. Any uri you own can be made an alias of any openid you want. Thus if you switch openid providers all you need to do is edit a page you own and make it point to a new provider. https://www.myopenid.com/help#own_domain https://www.myopenid.com/help#own_domain