Network authentication apparatus and method using integrity information of platform

A network authentication method and an apparatus thereof are provided to raise a security level of a network by authenticating a network and managing a network connection using platform integrity information. An authentication server(20) inspects user connection information and platform integrity information of a mobile platform device which requests to access a network, and permits the access, when a user is registered and the platform integrity is verified. An integrity information server(30) provides the reference information for verifying the integrity of the requesting mobile platform device to the authentication server. The authentication server includes a user information inspector(21), an integrity information inspector(22), a network access manager(23), and first and second databases(24,25). The integrity information server includes an integrity information database(34), an integrity information retriever(31), an integrity information manager(32), and an integrity information transceiver(33).