A communication system according to the present invention includes: a mobile station 10; an access point located on a radio access system; and a switch apparatus 30 connected to the radio access system, wherein a secured connection between a mobile station 10 and the access point 20 has been already established. The mobile station 10 includes a judgment unit 30 configured to judge whether or not to establish a secured connection between the mobile station 10 and the switch apparatus 30.

 
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> Validating User Identity by Cooperation Between Core Network and Access Controller

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