# History

#### 2024.3.28

I searched for fine-grained permission system and found this article:

{% embed url="<https://www.verygoodsecurity.com/blog/posts/building-a-fine-grained-permission-system-in-a-distributed-environment>" %}

OAuth2.0 was mentioned, then I turned to learn OAuth 2.0.

I need to find out how OAuth 2.0 can benefit on designing DAVID.

OAuth is mainly about authorization.

UMA (User Managed Access)&#x20;

Kubernetes - Service Mesh: Now, and Future.

Open Policy Agent (OPA) - an existing solution.