'Verifies the HMAC of self.response.comms.
This method raises a DecryptionError if the received HMAC does not
verify. If the HMAC verifies correctly, True is returned.
Raises:
DecryptionError: The HMAC did not verify.
Returns:
True'

def VerifyHMAC(self):

    return self._VerifyHMAC(self.response_comms)
