Using ABAC

When users authenticate through Keycloak, tokens issued by the server contain important information about the authentication context. Tokens contain information about the authenticated user and the client to which tokens were issued, as well as any other information that can be gathered during the authentication process. With that in mind, any information carried by a token can be used to authorize access to your applications. They are just claims mapped to tokens.

ABAC involves using the different attributes associated with an identity (represented by a token), as well as information about the authentication context, to enforce access to resources. It is probably the most flexible access control mechanism you can choose, with natural support for fine-grained authorization. Together with token-based authorization, applications using Keycloak can easily enable ABAC to protect their resources.

Token-based authorization is based on introspecting tokens and using the information...