| 摘要 |
PROBLEM TO BE SOLVED: To prevent a purchaser from illegally performing version upgrade by downloading firmware in regard to a firmware version upgrade system. SOLUTION: When it is confirmed that the purchaser of the firmware to be newly stored in a flash memory 105 has paid for the firmware and a secret number is issued to the purchaser, the purchaser requests the downloading of the firmware to be newly stored from a server device 120 through a personal computer 110. The server device 120 judges whether the purchaser who has requested the downloading is a legal purchaser on the basis of the secret number, and allows the firmware to be downloaded with respect to only the number of printers corresponding to a price paid for the firmware by the purchaser on the basis of an identifier proper to printers 101 when the purchaser is decided to be the legal purchaser. |
