| 摘要 |
<p>An objective of the present invention is to ensure anonymity of a movement path and alleviate the degree of abstraction of positioning data included in location information becoming too large when the location information is being tracked in realtime. In order that anonymized information of a first positioning time satisfies a prescribed anonymization index, and that the degree of abstraction of positioning data which is abstracted in the anonymized information falls below a prescribed reference value: an anonymized information group of a second positioning time which is earlier than the first positioning time is segmented into two or more groups; anonymized information is generated which includes the positioning data of the first positioning time, which is abstracted via the segmented groups; and the anonymized information thus generated is associated with the anonymized information of the second positioning time and stored in an anonymized information storage unit.</p> |
