Communication system, subscriber-information management apparatus, information acquisition method, non-transitory computer-readable medium, and communication terminal

A communication system comprising:

• a communication terminal;
• a control apparatus configured to process control data in a core network;
• a subscriber-information management apparatus configured to store subscriber information of the communication terminal;
• and
• a security apparatus configured to perform authentication processing for the communication terminal in cooperation with the subscriber-information management apparatus via the control apparatus, wherein
• the communication terminal transmits, to the control apparatus, identification information of a network slice that the communication terminal desires to use, and
• the communication terminal communicates, after the authentication processing has succeeded, with the network slice that the communication terminal desires to use based on the identification information of the network slice that the communication terminal desires to use.

A communication terminal comprising:

• at least one memory storing instructions, and
• at least one processor configured to execute the instructions to;
• transmit, to a control apparatus that processes control data in a core network, identification information of a network slice that the communication terminal desires to use;
• receive, via the control apparatus, first security information used for authentication processing by the core network;
• transmit second security information corresponding to the first security information to the control apparatus;
• and
• communicate, after the communication terminal has been authenticated by the core network based on the second security information, with the network slice that the communication terminal desires to use based on the identification information of the network slice that the communication terminal desires to use.