Removing a Key Assignment from a Object Storage
Remove a key assignment from a bucket.
- Open the navigation menu and select Storage. Under Object Storage & Archive Storage, select Buckets.
- Under List Scope, in the Compartment list, select the compartment that contains the bucket from which you want to remove a Vault service key assignment.
- From the list of buckets, select the bucket name.
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Next to Encryption Key , select Unassign. 
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In the Confirm dialog box, select OK to remove the key assignment from the bucket. 
 
- Open a command prompt and run - oci os bucket updateto remove the Vault service master encryption key assigned to a bucket:- oci os bucket update --name <bucket_name> --namespace-name <your_namespace> --kms-key-id ""- For example: - oci os bucket update --name Bucket-1 --kms-key-id "" --namespace-name example_namespace- For a complete list of parameters and values for CLI commands, see KMS CLI Command Reference. 
- This task cannot be performed using the API