pam-u2f ☆

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Description:
Provides an easy way to use U2F-compliant authenticators with PAM

Type: Formula | Tracked Since: Dec 28, 2025

Links: Homepage | formulae.brew.sh

Category: Security

Tags: pam u2f fido2 2fa security authentication

Install: brew install pam-u2f

About:
pam-u2f is a PAM module that enables two-factor authentication using U2F and FIDO2 hardware security keys. It allows users to log in to Linux or Unix systems by verifying their presence via a physical token, adding a strong layer of security beyond passwords. The module is designed to be simple to configure and integrates seamlessly with existing PAM setups.

Key Features:

Supports U2F and FIDO2 standards
Simple PAM integration
Challenge-response authentication
Configurable fallback to password-only login

Use Cases:

Securing SSH login with hardware tokens
Protecting console/sudo access on servers
Enforcing two-factor authentication for desktop Linux

Alternatives:

pam-u2f – This is the primary package; alternatives like Google Authenticator (TOTP) use a different method (time-based codes vs hardware tokens).

Version History

Detected	Version	Rev	Change	Commit
Jan 16, 2025 8:05pm		0	VERSION_BUMP	0a6bf66f