Encryption.Ruletype t = {sse_algorithm : Algorithm.t option;Default server-side encryption algorithm.
*)kms_master_key_id : string option;KMS key id/ARN when AWS KMS encryption is configured.
*)bucket_key_enabled : bool option;Whether S3 Bucket Keys are enabled for KMS.
*)blocked_encryption_types : Blocked_encryption_type.t list;Encryption types blocked by the bucket configuration, if S3 returns them.
*)}One default-encryption rule.