Using Bucket Policies and User Policies
Bucket policy and user policy are two of the access policy options available for you to grant permission to your Amazon S3 resources. Both use JSON-based access policy language. The topics in this section describe the key policy language elements, with emphasis on Amazon S3–specific details, and provide example bucket and user policies.
We recommend you first review the introductory topics that explain the basic concepts and options available for you to manage access to your Amazon S3 resources. For more information, see Introduction to Managing Access Permissions to Your Amazon S3 Resources.