Information providing system and authentication medium access comtrol method and computer program

摘要

A service provider 30 makes requests to an information processing center 70 for processing for an IC card 52 in card command units. The information processing center 70 issues encrypted card commands that can be interpreted by the IC card itself based on requests received from the service provider 30 and sends these to the IC card 53 via the computer network, client 51, and card reader/writer device 52. This enables an IC card connected to a client to be accessed using secure communication.