[OpenID] OpenID based on email addresses... Just Works!

[Martin Atkins]

Steven Livingstone-Perez wrote:
> I saw that coming Ben and it's a fair point.
> 
> When I do consultancy with various places they give me an email.
> 
> I may share that email with their systems that require an OpenID - but I'd
> rather tie it to my independent OpenID. That way, if I register with a
> system that continues to be valuable to me when I leave that company
> (government systems being a good example) I can simply change the email but
> maintain my identity.
> 
> Of course you may argue why not change the identity to the new email rather
> then? I just don't like changing primary identifiers in this manner due to
> side effects in other systems etc.
> 

Just as with HTTP-based OpenID identifiers, you need to choose the most 
appropriate identifier(s) to use for a given RP.

If you anticipate using something between multiple customers, why not 
use your own email address (or other URL-based identifier) from the outset?