A free, secure and open source app for Android to manage your 2-step verification tokens.

[Unmaintained] Open source two-factor authentication for Android

A one-time password (HOTP/TOTP) library for Java

Two Factor Authentication Java code implementing the Time-based One-time Password Algorithm

A small and easy-to-use one-time password generator library for Java implementing RFC 4226 (HOTP) and RFC 6238 (TOTP).

A QR code image generator and detector for React Native.

TOTP and HOTP Token for Andriod Devices

OneTrickPony is a modern Java library that implements support for One-Time Passwords. Built-In support is provided for the HOTP (RFC 4226) and TOTP (RFC 6238) algorithms.

Passwordless authentication server, supports OTP, WebAuthn and TOTP

HOTP/TOTP one time passwords on java phones (J2ME)

2FA for Minecraft!

手机宝令 for android 基于谷歌官方demo

🔒 OTP (One Time Password) utility in Java

Time-Based One-Time Password Algorithm Java Library

微信支付宝支付二维码生成

🔥两步验证Demo（two-factor authentication）与Google的两步验证工具保持一致

Extend Liferay Login to add 2 Factor Authentication in Liferay DXP 7.1 with OSGi and QR Code support.

When you'r forced to use OTP and session is expiring quickly - DeOtp to the recue - highly insecure stuff!

🔐 Tiny & lightweight RFC 4226 & RFC 6238 compliant one-time password (HOTP/TOTP) generation & validation library for Java

A Totp Client