Patent ID: 7603313

Claim:
A system for collecting a fee for a service of a service provider comprising: a request receiving unit which receives a request from said service provider to collect the fee from a user, said request including the amount of the fee; an IC card receiving unit which receives an IC card from the user, said IC card including service request data and digital signature data stored thereon, said IC card receiving unit being a physical device configured to read information stored on said IC card; a reading unit associate with said IC card receiving unit which reads said service request data and said digital signature data stored on said IC card; a determining unit which determines whether said service request data and said digital signature data are valid, said determining unit being a physical unit configured to conduct an electronic comparison being different items of electronic data; and a calculating unit which calculates the fee using the service request data on said IC card when it is determined that said service request data and said digital signature data are valid; wherein, said service request data is stored on said IC card in a physical way such that it cannot be modified using only a read and write process of a computer program, and said digital signature data is a function of said service request data.