Package google-authenticator

One-time pass-code support using open standards

https://github.com/google/google-authenticator-libpam/

The Google Authenticator package contains a plug-able authentication
module (PAM) which allows login using one-time pass-codes conforming to
the open standards developed by the Initiative for Open Authentication
(OATH) (which is unrelated to OAuth).

Pass-code generators are available (separately) for several mobile
platforms.

These implementations support the HMAC-Based One-time Password (HOTP)
algorithm specified in RFC 4226 and the Time-based One-time Password
(TOTP) algorithm currently in draft.
General Commands
Command Description
google-authenticator initialize one-time passcodes for the current user
System Administration
Command Description
pam_google_authenticator PAM module for Google two-factor authentication