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Andrew Liu edited this page Jun 23, 2018 · 3 revisions

Overview

The Google Authenticator project includes implementations of one-time passcode generators for Android. One-time passcodes are generated using open standards developed by the Initiative for Open Authentication (OATH) (which is unrelated to OAuth).

This implementation support the HMAC-Based One-time Password (HOTP) algorithm specified in RFC 4226 and the Time-based One-time Password (TOTP) algorithm specified in RFC 6238.

Google Authenticator for Android

The Android mobile app supports:

  • Multiple accounts
  • Support for 30-second TOTP codes
  • Support for counter-based HOTP codes
  • Key provisioning via scanning a QR code
  • Manual key entry of RFC 3548 base32 key strings

DISCLAIMER: This open source project allows you to download the code that powered version 2.21 of the application. Subsequent versions contain Google-specific workflows that are not part of the project.

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