Last updated：2021-04-28 11:04:11
|ACL||Bucket policy||User policy|
|Policy type||Resource-based policy||Resource-based policy||User-based policy|
|Resource operation||Only basic read/write operations are supported.||Many operations are supported, except service operations such as bucket list query.||Most operations are supported, including service operations such as bucket list query.|
|Authorize other accounts||Supported||Supported||Not supported. You can create a role and select a trusted account for cross-account authorization.|
|Authorize IAM users||Not supported||Supported||Supported|
|Authorize roles||Not supported||Supported||Supported|
You want to grant resource-specific permissions to other accounts for cross-account access.
You want to grant resource-specific permissions to IAM users who do not need to log in to the console.
You want to grant resource-specific permissions to IAM users who need to log in to the console.
You want to assign specific roles to IAM users to grant them temporary permissions.
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