SYMBOLIC TRANSFER SYSTEM OF ELECTRONIC VALUE FOR PLURAL RECIPIENTS, RECEIVING DEVICE, PAYING DEVICE AND CHALLENGE GENERATOR

摘要

PROBLEM TO BE SOLVED: To prevent the amount to be received from being illegally revised in the electronic cash transfer of payment to plural receiving devices. SOLUTION: The challenge generator of a third person who is not related to payment and reception is introduced. A challenge containing the amount to be received and the authority of reception for each of recipients is generated, and while using this challenge, the paying device pays the electronic cash to the plural receiving devices.