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AssigneeSony Corporation
InventorsTakuya Oshima, Takeshi Otsuka, Akira Honjo, Shinji Arakawa
Estimating the term…
An effective electronic settlement system in which the number of checks is small. The electronic settlement system includes a data storage device such as an IC card in which value information is stored, a client device provided with an information input/output function to the data storage device, a store device for providing commodities or services, a settlement management device for managing settlement between the data storage device and the store device, and a communication system for connecting the client device, the store device, and the settlement management device so as to enable bidirectional communication. The settlement management device creates, based on settlement request information from the store device, settlement information for making settlement by the data storage device, subjects the settlement information to an encryption processing by using a common key shared by the settlement management device and the data storage device, and transmits the settlement information subjected to the encryption processing to the client device, and the client device outputs the settlement information received from the settlement management device to the data storage device.
A settlement management device which can update value information stored in a data storage device through a client device, comprising:
A computer program encoded on a computer readable medium, the computer program including executable instruction that when executed causes a computer to function as a settlement management device for updating value information stored in a data storage device through a client device, wherein the settlement management device subjects value update information of the data storage device to an encryption processing by using a common key shared by the settlement management device and the data storage device, and transmits the value update information subjected to the encryption processing to the client device, and wherein the client device inputs the received value update information to the data storage device, and transmits settlement completion information to the client device.
A computer readable storage medium for storing a computer program for causing a computer to function as a settlement management device which can update value information stored in a data storage device through a client device, wherein the settlement management device subjects value update information of the data storage device to an encryption processing by using a common key shared by the settlement management device and the data storage device, and transmits the value update information subjected to the encryption processing to the client device, and wherein the client device inputs the received value update information to the client device.
Dependencies are inferred from the claim text.