two-factor

The Single Sign-On Multi-Factor portal for web apps

List of sites with two factor auth support which includes SMS, email, phone calls, hardware, and software.

**NOT MAINTAINED** Two-factor authentication for Node.js. One-time passcode generator (HOTP/TOTP) with support for Google Authenticator.

🔑 One Time Password (OTP) / 2FA for Node.js and Browser - Supports HOTP, TOTP and Google Authenticator

🔐 multi factor authentication system (2FA, MFA, OTP Server)

PHP library for Two Factor Authentication (TFA / 2FA)

A Web app to manage your Two-Factor Authentication (2FA) accounts and generate their security codes

A Security Framework for Python applications featuring Authorization (rbac permissions and roles), Authentication (2fa totp), Session Management and an extensive Audit Trail

Extract two-factor authentication (2FA, TFA, OTP) secret keys from export QR codes of "Google Authenticator" app. The secret and otp values can be printed and exported to json or csv. The QR codes can be printed or saved as PNG images.

Generate 2FA tokens compatible with Google Authenticator

The best React Native example for phone verification (an alternative to Twitter Digits).

One Time Password (HOTP/TOTP) library for Node.js, Deno and browsers.

.Net library for Two Factor Authentication (TFA / 2FA)

🔑 Second factor TOTP (RFC 6238) provider for Nextcloud

🔑 U2F second factor provider for Nextcloud

Two-Factor Authentication for all your users out-of-the-box.

🔑 Second factor provider using an external messaging gateway (SMS, Telegram, Signal)

Vonage Server SDK for Java. API support for SMS, Voice, Text-to-Speech, Numbers, Verify (2FA) and more.

Time-Based One-Time Password Code Generator

Better authentication for HTTP