Securing native and mobile applications

Securing a web application with Keycloak is more straightforward than securing a native or mobile application. Keycloak login pages are essentially a web application and it is more natural to redirect a user to a different web application when they are already within the browser.

You may be tempted to implement login pages within the application itself to collect the username and password, then leverage the OAuth 2.0 Resource Owner Password Credential grant to obtain tokens. However, this is simply something that you should not be tempted to do. As mentioned in the previous section, applications should never have direct access to the user credentials, and this approach also means you miss out on a lot of features provided by Keycloak.

To secure a native or mobile application, you should use the Authorization Code flow with the PKCE extension instead. This is more secure, and at the same time gives you the full benefits of using Keycloak.

Effectively...