ELECTRONIC SETTLEMENT SYSTEM AND METHOD USING SERIAL NUMBER INCLUDING IDENTIFICATION OF SOFTWARE, CONTENTS OR ELECTRONIC INFORMATION, AND COMPUTER-READABLE RECORDING MEDIUM FOR RECORDING PROGRAM FOR PERFORMING THE METHOD

摘要

An electronic settlement system using a serial number including identification of contents includes an issuer server for issuing coupons on which the serial number is printed to a user, and a contents provider server discriminating whether the serial number is true or not for itself without referring to a DB of the issuer server if the serial number is input from the user of the serial number, and providing the software, contents or electronic information to the user. The serial number is created and authenticated from at least one significant variable indicating the identification and a key set (x1 or y1) of at least one element of a set of solutions of a specified function having, as its coefficients, a plurality of values that include the at least one significant variable. The created and issued serial numbers are not stored in the DB, and thus the financial loss due to the DB leakage can be prevented. The authentication is smoothly performed without any online exchange between the issuer server and the contents provider server.