OAuth 2.0 is the industry-standard protocol for authorization. OAuth 2.0 focuses on client developer simplicity while providing specific authorization flows for web applications, desktop applications, …

OAuth 2.0 Simplified, written by Aaron Parecki, is a guide to OAuth 2.0 focused on writing clients that gives a clear overview of the spec at an introductory level.

Dec 1, 2025 · OAuth Working Group Specifications Current active drafts in the OAuth working group Active Drafts ... Active Individual Drafts ... RFCs

Even with all of this robust authentication capability, OpenID Connect is (by design) still compatible with plain OAuth 2.0, making it a very good choice to deploy on top of an OAuth system with minimal …

An open protocol to allow secure authorization in a simple and standard method from web, mobile and desktop applications. Learn more about OAuth 2.0 »

Sep 5, 2007 · ‘Why OAuth is not an OpenID extension?’ is probably the most frequently asked question in the group. The answer is simple, OAuth attempts to provide a standard way for developers to offer …

The core OAuth 2.0 specification defines the "client password" (e.g. client secret) client authentication type, which defines the client_secret parameter as well as the method of including the client secret in …

The OAuth spec allows the authorization server or user to modify the scopes granted to the application compared to what is requested, although there are not many examples of services doing this in …

PKCE was originally designed to protect the authorization code flow in mobile apps, but its ability to prevent authorization code injection makes it useful for every type of OAuth client, even web apps …

OAuth defines two types of clients: confidential clients and public clients. Confidential clients are applications that are able to securely authenticate with the authorization server, for example being …