@techreport{oai:ipsj.ixsq.nii.ac.jp:00044913,
 author = {今田, 美幸 and 高杉, 耕一 and 太田, 昌克 and Miyuki, Imada and Koichi, Takasugi and Masakatsu, Ohta},
 issue = {75(2004-CSEC-026)},
 month = {Jul},
 note = {本稿では，ユビキタスネットワーキング環境において，プライバシ保護と利便性を適度なバランスで保つことを目指したプライバシ保護のための提案手法LooM（Loosely managed privacy protection Method）について述べる．LooMは，従来の１対１通信を基本としたプライバシ保護をユビキタスネットワーキング環境に適用した場合の利便性低下に対する問題解決法として，プライバシ情報をデータベースとして管理し，匿名性の評価尺度として情報エントロピーを用いる手法である．人の移動に伴いデータベースのユーザ集合が変更しても単一量で表現できるような関数をを提案し，シミュレーションにより有効性を確認する．また，LooMは，追跡攻撃やプライバシ情報からのユーザID推定を回避できることを示す．, We propose a privacy protection method for use by service providers supplying users with services where user information requires privacy in the ubiquitous networking environments. The main feature is the use of an entropy value as a criteria for the evaluation of anonymity. This prevents loss of the convenience of services in the target environment. Objects in the ubiquitous environments will include more private information. This is because information gathered by sensors and so on will be added to static information such as sex and age. Furthermore the end-to-end communication assurance that are conventionally used become more complicated. In the new method, privacy information is managed in a database on a server. The novel idea behind the method is that a calculated by using this database decides whether or not the provider is given access to private information. The entropy value is independent of the number of people listed in the database, so the values are consistent over time . We implement the proposed method and evaluate it though simulations, thus confirming its anonymity feasibility.},
 title = {情報エントロピーを用いたプライバシ保護手法：LooM},
 year = {2004}
}