PROBLEM TO BE SOLVED: To appropriately anonymize position information by simple processing.SOLUTION: Provided is a position information anonymization method executed by a computer, the method including a position information acquisition step for acquiring a plurality of pieces of position information and an anonymization step for replacing the plurality of pieces of position information with an extended area that includes k or more pieces of position information (k is a positive integer). In the anonymization step, the extended area is determined as an area in any hierarchy among a plurality of areas structured by a tree structure or an area derived by excluding one or a plurality of lower hierarchy areas from the area in any hierarchy. Here, it is preferable that the extended area be determined not to include lower hierarchy areas that include k or more pieces of position information.SELECTED DRAWING: Figure 1

    【課題】簡易な処理により位置情報を適切に匿名化する。【解決手段】コンピュータが実行する位置情報匿名化方法であり、複数の位置情報を取得する位置情報取得ステップと、前記複数の位置情報を、k(kは正の整数)個以上の位置情報を含む拡張領域で置き換える匿名化ステップと、を含む。匿名化ステップでは、拡張領域を、木構造により構造化された複数の領域にうちのいずれかの階層の領域又は前記いずれかの階層の領域から1つ又は複数の下位階層の領域を除いた領域として決定する。ここで、前記拡張領域は、k個以上の位置情報を含む下位階層の領域を含まないように決定することが好ましい。【選択図】図1


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    Title :

    POSITION INFORMATION ANONYMIZATION METHOD, MOVEMENT INFORMATION ANONYMIZATION METHOD, AND DEVICE


    Additional title:

    位置情報匿名化方法、移動情報匿名化方法、および装置


    Contributors:

    Publication date :

    2016-12-08


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G06F ELECTRIC DIGITAL DATA PROCESSING , Elektrische digitale Datenverarbeitung / G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS



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