The Blockstack ruby library for identity and authentication

Authentication Strategy for OmniAuth to authenticate a user with an Ethereum account

Firebase Authentication uses ID Token. This gem verify the token on the server side.

Use Google Apps as an Authentication Provider

Rest client for services using CAS authentication.

Ruby SDK for the Machine Payments Protocol (MPP) — an HTTP 402 Payment Authentication scheme.

Supports: Admin user bind operation, Regular user authentication, Create (add), read (search), update (modify), and delete operations for users and groups

Twitch authentication with OAuth 2. Result tokens can be used for API libraries, chat libraries or something else.

Rack middleware that provides authentication based on CloudFlare JSON Web Tokens.

AnyCable Rails helpers for JWT-based authentication

Add secure, production-ready API key authentication to your Rails app in minutes. Handles key generation, hashing, expiration, revocation, per-key scopes; plus a drop-in dashboard for your users to self-issue and manage their own API keys.

Ruby implementation of the BitID authentication protocol

An extremely easy way to protect your site by requiring Google logins without having to set up a traditional authentication system

Rack middleware for using the Authorization header with token authentication

A simple authentication system for Rails apps

Generators to add in different forms of user authentication to a rails application.

A devise extension for remote user authentication.

Ghoul is a simple yet good looking interface for your git repositories written in sinatra. It is currently only for demonstration purposes and use on your secure local machine as it does not enforce any authentication as of yet.

Minimal cookie-based authentication for Rails applications with multi-tenancy support and granular session management

Adds Kerberos authentication via libsasl to the MongoDB Ruby Driver on MRI and JRuby