Amazon S3 bucket policies provide a centralized, JSON-based policy language to manage permissions for S3 resources. They are primarily used to grant or deny permissions to the operations and resources defined in the policy.Key Concepts:
- Resource-Based Policies: Bucket policies are resource-based, meaning they are attached directly to the resource (in this case, the S3 bucket). They define who has access and what actions they can perform.
- Principal: This specifies who is allowed or denied access. It can be an AWS account, IAM user, IAM role, federated user, AWS service, etc.