Patent ID: 8566357
Filing Date: 2013-10-22
Classification: G06F,G06Q,H04W

Abstract:
1. An information management apparatus comprising: a data receiving section configured to receive position data periodically from each of a plurality of mobile terminals, wherein said position data contains position measurement data showing a position of said mobile terminal and accompaniment data composed of measurement time of the position measurement data and identification data of a user of said mobile terminal; a user data storage section configured to store the position data received by said data receiving section as action history every user; a first extracting section configured to generate a node composed of the identification data of the user of the position data and object data, by using each of the position data of the action history stored in said user data storage section as the object data; a processing section configured to register on said node, a movement data set having as an element, at least one of the position data showing a position before movement to a position shown by the object data and the position data showing a position after the movement from the position shown by the object data, with respect to the object data contained in said node; an abstraction scheme storage section configured to store an abstraction scheme to the position data; an abstracting section configured to apply the abstraction scheme stored in said abstraction scheme storage section to the object data of said node; and a testing section configured to extract other nodes, each of which has identification data different from that of the user of the node, which has the object data abstracted by said abstracting section, and object data of a same position as a position of the object data of the node or a position contained in a position of the object data of the node, and each of which has a movement data set with which a product set of the movement data set of the node is an empty set, and output the object data of the node as anonymity data when the number of other nodes is equal to or more than a predetermined threshold value.