| 摘要 |
<P>PROBLEM TO BE SOLVED: To verify the correctness of two or more kinds of selling information offered by vendors. <P>SOLUTION: The correctness of offered information from a plurality of information offering systems is determined by using a certification device. An information obtaining device for obtaining correct offered information includes an offered information transfer unit for receiving offered information offered by the information offering system, and a vendor electronic signature for indicating that the information has been offered from the original information offering system and sending it to a certification unit; an obtaining unit for obtaining two or more kinds of offered information and the certification information from the certification unit for indicating the correctness of the vendor electronic signature generated by the certification unit; and a correctness displaying unit for displaying the correctness of two or more kinds of offered information. <P>COPYRIGHT: (C)2004,JPO |
