Management apparatus, measurement apparatus, service providing apparatus, computer program product, transfer system, and transfer method

1. A service providing apparatus that is connected to a measurement apparatus via a second network, and that is connected to a management apparatus via the second network,

the measurement apparatus comprising:

a first storage that stores therein a measurement apparatus individual key shared with the management apparatus;

a first communication device that is connected to the measurement apparatus via a first network;

a second communication device that is connected to the service providing apparatus via the second network; and

one or more first processors coupled to the first storage, the first communication device, and the second communication device, wherein

the first communication device receives seed information generated using a service providing apparatus identifier stored in and shared between the management apparatus and the service providing apparatus from the management apparatus via the first network, the service providing apparatus identifier uniquely assigned to the service providing apparatus,

the first processors generate a user key using the measurement apparatus individual key and the seed information,

the first processors acquire measurement information representing a physical quantity of a target of a service provided by the business entity to the user,

the first processors generate authentication information authenticating legitimacy of the measurement information using the measurement information and the user key,

the second communication device transmits the measurement information and the authentication information to the service providing apparatus via the second network,

the service providing apparatus comprises:

a user information storage that stores therein at least one key;

a third communication device that is connected to the management apparatus via the second network;

a fourth communication device that is connected to the measurement apparatus via the second network; and

one or more second processors coupled to the third communication device and the fourth communication device,

the third communication device receives the user key from the management apparatus via the second network,

the fourth communication device receives the measurement information and the authentication information from the measurement apparatus via the second network,

the second processors validate whether the measurement information received from the measurement apparatus is legitimate, using the user key stored in the user information storage and the authentication information,

the third processors execute a process of providing a service to a user for whom the measurement apparatus having transmitted the measurement information is deployed, using the measurement information validated to be legitimate

when the user key is received from the management apparatus, the second processors append order information used for identifying a new user key to the received user key and write in the user information storage,

at a time of validating, the second processors append usage information to the user key, the usage information indicating that an update of the user key in the measurement apparatus is completed, and

at a predetermined timing, the second processors delete, from among one or more user keys stored in the user information storage, one or more user keys for which the update is completed excluding the new user key identified based on the order information.

2. The service providing apparatus according to claim 1 , wherein the third processors determine an update failure of the user key in the measurement apparatus using the order information and the usage information.

3. A computer program product having a non-transitory computer-readable medium that stores therein a computer program causing a computer to function as the service providing apparatus according to claim 1 .