| 摘要 |
PROBLEM TO BE SOLVED: To effectively protect privacy of an owner of data by anonymizing time information and position information simultaneously.SOLUTION: A position information anonymity apparatus corresponds to an n-dimensional coordinate system (n is an integer of two or more) indicating true position information to generate a random number, and adds the generated random number to the n-dimensional coordinates system indicating the true position information, to generates perturbed coordinate information. True coordinate information, when the generated coordinate information is defined as central coordinates and a radius is defined as r, is included in the solid formed by such a condition, and a radius r according to required degree of anonymity is determined. On the basis of a value according to the degree of anonymity requiring time information in which the true position information is acquired, perturbed time information is generated by adding a time width to the time information. |
