UNIVERSAL LOGIN AUTHENTICATION SERVICE

A system and method enables secure login at linked sites with a universal ID (UID) and possibly different or same password to linked identities. In such logins, a user stays at the linked login page, and the login name and password are sent to a UID provider for authentication. A UID provider may perform optional multi-factored authentication. A UID user is able to manage all his accounts, which are linked to his UID service, by changing the login names, passwords, security requirements, privacy requirements, and authentication requirements, with group-wise control. Successful or failed logins to linked accounts may be reported to a UID user. A UID user may disable logins at a group of linked accounts.