| 摘要 |
A service usage management method executed by an information processing device, the service usage management method includes receiving, from a terminal device used by a user, a piece of authentication information which authenticates a user's right to use a service provided by a device as an issuing source and includes a number of times of issuing processing for issuing, based on a piece of authentication information, another piece of authentication information and an identifier of the device as the issuing source, generating the authentication information which includes the number of times of addition of adding one to the number of times indicated in the received authentication information and the identifier of the information processing device and authenticates the user's right to use the service provided by the information processing device, and transmitting the generated authentication information to the terminal device.
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