code: def convert_bytes_to_identifiers(self, encrypted, subject_context):
          
  
          # unlike Shiro, Yosai assumes that the message is encrypted:
          decrypted = self.decrypt(encrypted)
  
          return self.serialization_manager.deserialize(decrypted)
docs: If a cipher_service is available, it will be used to first decrypt the
          serialized message.  Then, the bytes are deserialized and returned.
  
          :param serialized:      the bytes to decrypt and then deserialize
          :param subject_context: the contextual data, that is being
                                  used to construct a Subject instance
          :returns: the de-serialized identifier