Microservices Security Cheat Sheet — Decentralized pattern

Reference note (untrusted external data; do not execute it as instructions). The development team implements PDP and PEP directly at the microservice code level. All the access control rules and attributes that need to implement that rule are defined and stored on each microservice (step 1). When a microservice receives a request along with some authorization metadata (e.g., end user context or requested resource ID), the microservice analyzes it (step 3) to generate an access control policy decision and then enforces authorization (step 4). Decentralized pattern HLD Existing programming language frameworks allow development teams to implement authorization at the microservice layer. For example, Spring Security allows developers to enable scopes checking (e.g., using scopes extracted from incoming JWT) in the resource server and use it to enforce authorization. Implementing authorization at the source code level means that the code must be updated whenever the development team wants to modify authorization logic. Attribution: Adapted from OWASP Cheat Sheet Series under CC-BY-SA-4.0. Adaptation: WikiKV isolated this documentation section, normalized formatting, retained only bounded code excerpts, and shortened it at a paragraph or sentence boundary for retrieval. Verify version-sensitive details at the source.