This section describes how to use the KMS console to enable one or more custom keys. Only enabled custom keys can be used to encrypt or decrypt data. A new custom key is in the Enabled state by default.
The custom key you want to enable is in Disabled status.
in the upper left corner of the management console and select a region or project.
on the left and choose .To enable multiple keys at a time, select them and click Enable in the upper left corner of the list.