Patent ID: 8112795

Claim:
A communication system comprising a non-contact type semiconductor device attached to an item, a first read device that wirelessly communicates with the non-contact type semiconductor device, and a second read device provided for a mobile terminal that wirelessly communicates with the non-contact type semiconductor device, wherein the non-contact type semiconductor device comprises a transmission/reception unit that wirelessly communicates with the first read device or the second read device, an authenticating information storage unit that stores identifying information and authenticating information to identify either the first read device or the second read device being correlated with each other, an information storage unit that stores information read and written from either the first read device or the second read device, an authenticating unit that, when identifying information and authenticating information to identify either the first read device or the second read device that are received by the transmission/reception unit are stored in the authenticating information storage unit being correlated with each other, authenticates the first read device or the second read device, and a control unit that executes a request from either the first read device or the second read device that is authenticated by the authenticating unit, and wherein the first read device acquires data stored in the information storage unit of the non-contact type semiconductor device, transmits the data thus acquired to the mobile terminal as well as acquires identifying information and authenticating information of the portable terminal, and executes an editing process for adding reading authority of the information storage unit by at least the second read device to the authenticating storage unit of the non-contact type semiconductor device based on the identifying information and the authenticating information thus acquired.