Multi-Factor Authentication (MFA)

• http://aws.amazon.com/jp/iam/details/mfa/

TOTPとHOTP

• 2要素認証のTOTPとHOTP、どちらがより安全か？
  • https://blog.ohgaki.net/2fa-totp-hotp-which-is-safer

• TOTP: Time-based One Time Password
• HOTP: HMAC-based One-Time Password

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• GoogleAuthenticator

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• AWSアカウントの2段階認証を設定する
  • http://qiita.com/macoshita/items/06e2a2474bc8eca1a67d

• 「２段階認証」突破狙う詐欺サイトが急増　作成ツール出回る
  • https://www.sankei.com/affairs/news/191201/afr1912010010-n1.html