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認証認可.pdf
1.
認証・認可 2021/7/2(金) 松田幸典
2.
今回実際に調べてみて,,, • まず、認証認可の話は奥が深い!!! • 調べていくうちにOAuthやOpenID
Connectなど色々出てくる • 認証認可?ログインのことやろ?,,
3.
認証と認可について 認証 (Authentication) • 通信の相手が誰(何)であることかを確認すること • 成り済ましでないことを確認すること 認可 (Authorization) •
特定の条件に対して、リソースアクセス権限を与えること → 権限を与えること
4.
認証と認可 HTTP statusの話 認証 (Authentication) •
401 Unauthorized — 認証の失敗 • 「おまえ誰だよ」 言葉は似てるけど別の概念! 認可 (Authorization) • 403 Forbidden — 認可の不足 • 「理解した、だが断る」
5.
認証の話 認証 (Authentication) • 通信相手のID(属性)をなりすましではないことを確信すること 認証要素 現実の世界
電子の世界 あなたはだれ? 顔、声、署名筆跡 生体認証(指紋、声紋認証) 何をもってるの? 印鑑、身分証明書、カード 携帯電話,電子証明書, セキュリティートークン あなたはだれ? 合言葉 パスワード
6.
(key) 錠(lock)
7.
認可 の話 認可 (Authorization) • 誰かに
を渡すこと。 • 例えば乗車券 • 切符を持って入れば、電車に乗れる。なければ乗れない。 • 認可に身元確認は必須ではない や切符から「誰か」はわからない
8.
1.ユーザーに「 (key)」を与える。 2.リソースに「錠(lock)」をかける。 3.アクセス時に を使って解錠する。 ポリシー定義 ポリシー施行
9.
アクセストークン ・認証済みユーザーを識別するための文字列。 ・トークン・・・「証拠」「しるし」「象徴」
10.
認証と認可 の密結合の話 認証 (Authentication) と 認可 (Authorization) ・相手はAさんだ! だからアクセス許可 ・相手はAさんでない!
アクセスは許可されない ・アクセスが許可された、つまりAさん(!?) ・アクセスが許可されなかった、つまりAさんでない →この様に認証と認可の、逆・裏・対偶が出てくる。
11.
認証と認可 の話 • 認証に基づく認可 これが多くの人が考えるパターン。 例)運転免許書などがいい例。 •
認可に基づく認証(!?) 例) この人はAさんの家の を持ってるから、Aさんだね →これの考えがOAuth認証の考えにつながる。