Core Network Device, Communication Terminal, Communication System, Authentication Method, And Communication Method

Abstract: An object is to provide a core network device being able to efficiently perform secondary authentication to be performed for each network slice. A core network device (10) according to the present disclosure includes an authentication unit (11) configured to perform, during registration processing of registering a communication terminal in a core network, first authentication processing of determining whether the communication terminal is a communication terminal permitted to be registered in the core network, a communication unit (13) configured to receive permission list information indicating at least one network slice usable by the communication terminal in a serving network, and an authentication unit (12) configured to perform, during registration processing of registering the communication terminal in the core network, second authentication processing of determining whether the communication terminal is a communication terminal permitted to use a network slice included in the permission list information.

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