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Flows
Authorization Code Flow
OAuth 2.0 protocol designed for web applications that can securely store client secrets. The application directs users to an authorization server to log in and grant permissions. Upon consent, the server issues an authorization code. The application then exchanges this code for an access token in a server-to-server request, using its client ID, client secret, and redirection URI. This flow ensures the access token is never directly exposed to users, offering enhanced security. It's best suited for server-side web applications with the capability to protect the client secret.
Device Authorization Grant
OAuth 2.0 flow optimized for devices that either lack a browser or have limited input capabilities, such as smart TVs, game consoles, and certain IoT devices. In this flow, the device makes a request to the authorization server and receives a unique user code and a verification URL. The user then accesses this URL on a separate device with a browser, like a smartphone or computer, and enters the user code. After successfully logging in and providing consent, the device polls the authorization server to obtain an access token. This method ensures a streamlined user experience for devices with restricted input or display capabilities, allowing them to access protected resources without the need for intricate user interactions.
WebAuthN
This protocol leverages public key cryptography and allows users to authenticate using biometrics, mobile devices, or FIDO security keys, instead of traditional passwords. When a user registers with a website, a unique key pair is generated: the private key stays securely on the user's device, and the public key is registered with the website. For subsequent logins, the website challenges the user to prove ownership of the private key, typically by prompting for a biometric or a physical action on a security key. WebAuthn enhances user security by reducing reliance on easily compromised passwords and defending against phishing attacks.