1xml.instruct!
 2
 3xml.Envelope do
 4  xml.Header do
 5    xml.Security do
 6      encrypt_key_for(xml: xml, id: key_id, key_info: header_key_info)
 7      xml.BinarySecurityToken ''
 8    end
 9  end
10  xml.Body Id: id  do
11    encrypt_data_for xml: xml, key_info: data_key_info do |xml|
12      xml.EncryptMe do
13        xml.Secret "secret"
14      end
15    end
16  end
17end