&gt;Once you have your data restored, you can change the encryption key.<p>Unfortunately, even if you change it, they still have access to the files encrypted with the previous key.<p>Also, it&#x27;s generally recommended to test the restoration of your backups, otherwise you can find yourself in a really bad spot if&#x2F;when you <i>need</i> to restore - IMHO, this definitely includes verifying that there wasn&#x27;t an error in the encryption&#x2F;decryption process (i.e. changing the key would necessitate testing decryption with the new key, which requires giving them the new key).