def yaml(self):
        return yaml.dump(self.serialized, default_flow_style=False,
                         encoding=None)
def encrypt(self, raw):
        raw = self._pad(raw)
        iv = Random.new().read(AES.block_size)
        cipher = AES.new(self.key, AES.MODE_CBC, iv)
        return iv + cipher.encrypt(raw)