Some environments necessitate the authentication of the human user rather than a process or a device. In authenticating human users, the authentication system requires human users to prove their uniqueness. Such uniqueness is generally based on various authentication means such as something known, something possessed or some immutable characteristics for each human user.

In this Recommendation, a guideline on user authentication mechanism for home network services is provided. It also considers various security issues according to ITU-T Recommendation X.1111, which specifies the framework of security technologies for home network. Finally, the security assurance level and authentication model are defined according to authentication service scenarios.