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プライバシーデータは
ビッグデータじゃない

ミニマルな情報の集積と
大規模情報の分析の違いについての
考察
ビッグデータとは
●

すでに蓄積された膨大なデータ
–
–

高速道路の通行量

–

チェーン店全体の販売情報

–

株価の推移

–
●

たとえば,Twitter上の膨大なツイート

CD/DVD等のタイトル別売上情報

ビッグデータの主体はモノや状況
プライバシーデータとは
●

個人に属する情報
–
–

個人単位の購買履歴

–

個人単位のWEBアクセス履歴

–

個人単位の移動履歴

–
●

基本四情報(年齢,性別,氏名,住所)

等々

プライバシーデータの主体は個人に関する情報
プライバシーデータと
ビッグデータの主な違い
●

プライバシーデータ
–
–

個人情報との紐づけが必要

–

ミクロ単位のデータ

–
●

個人に注目したデータ

個人単位の傾向を求めるために利用されるデータ

ビッグデータ
–

個人に注目しないデータ

–

個人情報とは切り離される

–

マクロ単位のデータ

–

俯瞰した状況を求めるために利用されるデータ
ビッグデータに
個人情報は不要
●

コンビニエンスストアの例
–

–

●

地域別の各店舗の販売傾向を調べるためには,
ポイントカードの情報は不要
商品別,カテゴリ別の販売数等の情報が
あればよい

渋滞予測等の例
–

ナンバープレートやETCカードの情報は不要

–

期間別,時間別等の交通量データがあればよい
プライバシーデータが必要な例
●

●

●

●

個人単位の購買情報等から生活環境や興味傾向を
もとにレコメンドを出す(Tカード等)
個人別の行動,移動情報をもとに個人に最適化し
た情報を提示する(Tカード等)
個人の嗜好や個人が提示した条件などを元に,個
人をマッチングする(お見合いサイト等)
個人の閲覧履歴をもとに広告を出す(WEB広告
等)
最大の違い
●

利用目的
–
–

●

ビッグデータの利用目的は個人にリーチしない
プライバシーデータの利用目的は個人に
リーチする

データの違い
–

–

ビッグデータは個人のプライバシーデータを
必要としない
プライバシーデータはビッグデータを
ほとんど必要としない
まとめ
●

●

●

●

ビッグデータとプライバシーデータは,その利
用目的が大きく違う
プライバシーデータは「個人に注目したミクロ
なデータ」の蓄積
ビッグデータは「事象に注目したマクロなデー
タ」の蓄積

ベクトルが全く違う
=別物のデータ集合
最後に

パーソナルデータの集合体を
ビッグデータと詐称するのは
やめよう!!!
最後に

パーソナルデータの集合体を
ビッグデータと詐称するのは
やめよう!!!

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プライバシーデータはビッグデータじゃない