Patent ID: 8849861

Claim:
An information management apparatus, which receives position data from each of a plurality of terminal devices, the position data containing position measurement data which show positions of one of the plurality of the terminal devices at a plurality of clock times and user identification data of the one of the plurality of the terminal devices, creates action history for every user based on the position data, and abstracts the position data included in the action history, the information management apparatus comprising: an abstracting section configured to abstract object data, the object data being arbitrary position data included in the action history; and a testing section configured to extract other action histories, each of the other action histories including another position data which contains an user identification data different from the user identification data of the object data and shows a position same as or included in a position of the object data, each of the other action histories excluding position data which shows a position same as any of position data of the action history including the object data other than the other position data, and output the object data as anonymity data when the number of the other action histories is equal to or more than a predetermined threshold value.