Someone correct me if I’m wrong, but I don’t think you can use
standard cookies across domains.
He didn’t say the apps were on separate domains.
Have you thought about using OpenID’s? There are some really good
Sure, but this will not get around the cross-domain cookie issue. If
the apps are on separate domains, the user will still have to enter his
If these apps are going to be used in a workplace or similar scenario,
you could try to use LDAP or AD…I know there are some gems to help
Again, I don’t think this would help authenticate to multiple apps.
There may be other good reasons to use these methods of authentication,
but they do not address the OP’s issue.