Data distribution intermediary device and data distribution intermediary method

A data distribution intermediary method executed by a data distribution intermediary device for mediating data exchange between a data provision device of a data provider that collects and provides personal data provided by a data owner and a data usage device of a service provider that provides service usage data related to the personal data, the data distribution intermediary method comprising:

• a step of the data distribution intermediary device acquiring personal data metadata that is metadata of the personal data stored in the data provision device;
• a step of the data distribution intermediary device generating service usage data metadata, which is metadata related to the service usage data, based on terms of service related to distribution and usage of the personal data, where the terms of service are acquired by an interaction between the data provision device and the data usage device and wherein the interaction includes:
• a service usage request message, including a service ID, being sent by the data provision device to the data intermediary device,
• a terms-of-service request message, including the service ID, being sent by the data intermediary device to the data usage device, and
• a terms-of-service request response, including terms-of-service corresponding to the service ID, being sent by the data usage device to the data intermediary device, wherein the terms-of-service are determined by the service provider which provides a service corresponding to the service ID;
• a step of the data distribution intermediary device detecting a difference between the personal data metadata and the service usage data metadata;
• and
• a step of the data distribution intermediary device determining a necessity of conversion processing of the personal data base on the difference between the metadata detected in the step of detecting the difference between the personal data metadata and the service usage data metadata;
• and
• a step of the data distribution intermediary device converting the personal data to the service usage data based on the service usage data metadata when the personal data is determined to be necessary to be converted in the step of determining the necessity of the conversion processing of the personal data, wherein
• in the step of converting the personal data to the service usage data, the personal data is converted to the service usage data to match an attribute defined for each data item defined in the service usage data metadata.