Scenario: . A web application will be hosted on several domains (for example, www.example.com, www.example.co.uk, www.example-3.com, etc.). When a user logs into any of these domains, the data will be stored in a centralized primary database. When a user logs into a website, session data will be stored in a centralized primary database.
Requirement: A registered user will be able to browse any domain (share the same session database). And while he is browsing for a domain other than the domain in which he really logged in, the session should remain the same as not having to log in again. We do not want to use something like openid.
Question . How can we achieve this requirement based on a scenario so that we do not need to have a third-party service (OpenID, Lasso, etc.)?
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