Google Authenticator
Open source fork of the Google Authenticator Android app observed · 2026-08-28
Health v2 · maintenance only
10/100
- Activity 0
- Release rhythm 8
- Longevity 100
Flags: archived
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 4347
- days_rel: n/a
- days_push: 2276
- n_releases_24m: 0
Adoption not part of the score
1670 stars · 483 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
The open-source implementations of Google Authenticator, generating one-time passcodes using the OATH HOTP (RFC 4226) and TOTP (RFC 6238) standards. It includes mobile apps for iOS and Blackberry, an Android app, and a PAM module for Linux two-factor authentication.
Use cases
- generate two-factor authentication codes on my phone
- add TOTP 2FA to Linux SSH login
- implement RFC 6238 time-based one-time passwords
- self-hosted two-factor authentication without account backups
- verify user identity with one-time passcodes
When to choose
- you need standards-compliant HOTP/TOTP code generation
- you want 2FA on Linux logins via PAM
- you prefer no cloud account backups for security reasons
When to avoid
- you want the current Play Store/App Store Google Authenticator app with cloud sync
- you need actively developed mobile apps - the code has diverged from store versions
- you need push-based or modern 2FA methods beyond OTP
Facets
application · maturity maintenance
auth security cryptography security privacy mobile-development cross-platform totp hotp two-factor-authentication otp pam open-authentication ios android linux
2 sources
- readme: https://github.com/google/google-authenticator-android · fetched 2026-08-28 · 53556023dd12
- homepage: https://play.google.com/store/apps/details?id=com.google.android.apps.authenticator2 · fetched 2026-08-29 · 44136fa355b3
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| google/google-authenticator-android | main | 10 |
| google/google-authenticator | main | 10 |
| google/google-authenticator-libpam | plugin | 63 |
For agents
markdown · JSON · MCP: product_card(name="google/google-authenticator-android")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem