def switch_fingerprint_method(self, old=False):
        """
        Switches main fingerprinting method.

        :param old: if True old fingerprinting method will be used.
        :return:
        """
        if old:
            self.has_fingerprint = self.has_fingerprint_moduli
        else:
            self.has_fingerprint = self.has_fingerprint_dlog
Switches main fingerprinting method.

        :param old: if True old fingerprinting method will be used.
        :return: