(self)
return self.block_num >= 2
1-N OT with N no smaller than 2 is supported
        :return:
1-N OT with N no smaller than 2 is supported
        :return:
1 - N OT with N no smaller than 2 is supported : return :
def _check_oblivious_transfer_condition(self):
        """
        1-N OT with N no smaller than 2 is supported
        :return:
        """
        return self.block_num >= 2
def _check_oblivious_transfer_condition ( self ) : return self . block_num >= 2