Patent ID: 7308424

Claim:
A one-time ID (identification) information issuing system to be used in a transaction wherein: a one-time ID information is issued to a purchaser who has been assigned original ID information for making payments by an original ID information issuer; the issued one-time ID information is sent to the purchaser and to a payment agency; the purchaser sends the issued one-time ID information to a seller in a business transaction; the seller sends the one-time ID information of the purchaser to the payment agency; the payment agency obtains the original ID information for the purchaser based on the sent one-time ID information and determines whether to pay to the seller for the business transaction based on the obtained original ID information for the purchaser, and pays to the seller for the business transaction, in a case where it is determined to pay for the business transaction, said one-time ID information issuing system comprising: one-time ID information providing means for receiving a purchaser request for one-time ID information, the purchaser request including the original ID information, for checking whether the original ID information included in the purchaser request is valid as to the purchaser submitting the purchaser request, for generating one-time ID information only if it is determined that the original ID information included in the purchaser request is valid as to the purchaser submitting the purchaser request, and for providing thus generated one-time ID information to the purchaser, the one-time ID information providing means also providing the payment agency with the thus generated one-time ID information and the original ID information corresponding to the thus generated one-time ID information in a secure manner.