Guide to Java authentication and authorization

Authorization is crucial for ensuring only authorized users can access specific resources in an application. Traditional methods like RBAC have been supplemented by ABAC and PBAC for more granular control. OAuth and OpenID Connect are popular for secure authentication. The post reviews three Java frameworks: Spring Security, Apache Shiro, and JAAS, and discusses their features and integration capabilities. The role of authorization in microservices, its challenges, and emerging technologies like zero trust architecture are also explored.