INFORMATION COMMUNICATION SYSTEM, AUTHENTICATION DEVICE, ACCESS CONTROL METHOD OF INFORMATION COMMUNICATION SYSTEM, AND ACCESS CONTROL PROGRAM

PROBLEM TO BE SOLVED: To realize precise access control according to attributes of a terminal device.SOLUTION: An information communication system comprises an access control device 100 and a service providing server 300. The access control device comprises: a security policy storage unit which stores a security policy 130; a policy determination device 120 which determines a security state of a user terminal 200 on the basis of attribute information of the user terminal 200; an authentication information conversion device 140 which encodes a determination result made by the policy determination device 120, and acquires post-conversion authentication information by using a conversion table 150; and an authentication information change management device 160 which transmits the post-conversion authentication information acquired by the authentication information conversion device 140 to the service providing server 300. The service providing server 300 comprises: an access control list 320 in which types of access authority are set for the respective pieces of post-conversion authentication information; and an access execution unit which, on the basis of the received post-conversion authentication information, executes access according to the type of the access authority acquired from the access control list 320.