🔐 A PHP library for generating one time passwords according to RFC 4226 (HOTP) and the RFC 6238 (TOTP)

🔑 Second factor TOTP (RFC 6238) provider for Nextcloud

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

Javascript One-Time Password module.

Time-Based One-Time Password (TOTP) and HMAC-Based One-Time Password (HOTP) library for Go.

Lightweight, thread-safe Java/Kotlin TOTP (time-based one-time passwords) and HOTP generator and validator for multi-factor authentication valid for both prover and verifier based on shared secret

TOTP authenticator implement as a terminal tool

OTP authentication for OpenBSD implementing RFC 6238 and RFC 4226.

TOTP authenticator implement as a wechat mini program

One Time Password for 2-Factor-Authentication implemented in Rust

A kotlin implementation of HOTP (RFC-4226) and TOTP (RFC-6238). Supports validation and generation of 2-factor authentication codes, recovery codes and randomly secure secrets.

Dart One-Time Password module.

One-time password PHP implementation of HMAC-based algorithm according to RFC 4226 and RFC 6238 compatible with Google Authenticator.

TOTP for php (https://tools.ietf.org/html/rfc6238)

A Go implementation of RFC 4226 HOTP: An HMAC-Based One-Time Password Algorithm and RFC 6238: TOTP: Time-Based One-Time Password Algorithm

Simple OTP implementation in node.js according to rfc 4996 and rfc 6238

Time-Based One-Time Password Algorithm, as described in RFC 6238

Shell-script (Bash) with functions relevant to 2FA. Compatible with Google Authenticator.

A simple OTP generator written in Swift.

An authenticator implementing RFC 6238, utilizing the OpenSSL library to encrypt secrets for cross-machine usage.