This section describes IAM's fine-grained permissions management for your KMS resources. With IAM, you can:

Create IAM users for employees based on the organizational structure of your enterprise. Each IAM user has its own security credentials to access KMS resources.
Grant users only the permissions required to perform a task.
Entrust an account or cloud service to perform efficient O&M on your KMS resources.

If your account does not need individual IAM users, skip this chapter.

This section describes the procedure for granting permissions (see Figure 1).

Prerequisites

Before granting permissions to a user group, you need to understand the available KMS permissions, and grant permissions based on the real-life scenario. The following tables describe the permissions supported in KMS.

**Table 1** KMS permissions
Role/Policy	Description	Type
KMS Administrator	Administrator permissions for the encryption key	Role
KMS CMKFullAccess	All permissions for the encryption keys	Policy
KMS CMK Admin	All permissions for the encryption keys	Policy
KMS CMKReadOnlyAccess	Read-only permission for encryption keys	Policy

Authorization Process

Figure 1 Authorizing the KMS access permission to a user

Create a user group on the IAM console and grant the user group the permission (indicating full permissions for keys).
Create a user on the IAM console and add the user to the user group created in 1.
Log in to the console as newly created user, and verify that the user only has the assigned permissions.

Creating a User and Authorizing the User the Permission to Access KMS

Prerequisites

Authorization Process