2FA セットアップガイド

Dropbox アカウントで 2FA を有効にする方法

2026年6月5日を更新しました

2 要素認証 (2FA) は、パスワードが漏洩した場合でも、Dropbox アカウントを保護します。 iPhone、iPad、または Mac で Authenticator App を使用して Dropbox 検証コードを生成するには、以下の手順に従ってください。

Download Authenticator App
Download Authenticator App from the App Store on your iPhone, iPad or Mac. It's free and no sign-up is required.
Open Dropbox security settings
Click your avatar → “Settings” → “Security” tab.
Turn on two-step verification
Toggle on “Two-step verification” and choose “Use a mobile app”. Dropbox will display a QR code.
Scan the QR code with Authenticator App
Open Authenticator App, tap the + button and scan the QR code shown by Dropbox. If you can't scan it, choose the manual option on Dropbox and type the setup key into the app instead.
Enter the 6-digit verification code
Type the 6-digit code from Authenticator App back into Dropbox to confirm the setup. The code refreshes every 30 seconds.
Save your backup codes
If Dropbox offers backup or recovery codes, download or write them down and store them somewhere safe. They let you regain access if you ever lose your device.