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Single sign-on (SSO) is an authentication process that allows a user to access multiple applications with one set of login credentials. SSO is a common procedure in enterprises, where a client accesses multiple resources connected to a local area network (LAN).
SSO advantages include:
With SSO, a user logs in once and gains access to different applications, without the need to re-enter log-in credentials at each application. SSO authentication facilitates seamless network resource usage. SSO mechanisms vary, depending on application type.
SSO is not suited for systems requiring guaranteed access, as the loss of log-in credentials results into denial of access to all systems. Ideally, SSO is used with other authentication techniques, such as smart cards and one-time password tokens.